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Ifqldlt k/LIffsf k|Zgx
1.
ul0ft z[ªvnf –
% / ^ If]qldlt P;Pn;L k/LIffsf] kl/dflh{t ljlzi6Ls/0f tflnsf 2065 cg';f/ If]qldltaf6 3 cf]6f 5f]6f] pQ/ cfpg] 6 cªs / 2 cf]6f nfdf] pQ/ cfpg] 8 cªs u/L hDdf 14 cªssf] 5 cf]6f k|Zgx¿ ;f]lwg] k|fjwfg 5 . k/LIffnfO{ ;xof]uL x'g] s]xL dxŒjk"0f{ k|Zgx¿ pbfx/0f;lxt oxf“ k|:t't ul/Psf] 5 . -s_ 5f]6f] pQ/ cfpg] k|Zgx¿ pbfx/0f M 1 ePsf] lqe'hsf] If]qkmn / eP AB sf] gfk lgsfNg'xf]; . ;dfwfg M xfdLnfO{ yfxf 5, jf, jf, k]m/L, sf] If]qkmn (1) jf, jf, jf, (1) ctM AB sf] gfk = 8cm. pbfx/0f M 2 k"/f ;txsf] If]qkmn ePsf] s'g} uf]nfsf] prfO lgsfNg' xf]; . ;dfwfg M lbOPsf], k"/f ;txsf] If]qkmn uf]nfsf] prfO = ? ;"q cg';f/, jf, (1) jf, jf, ctM uf]nfsf] prfO / Jof; a/fa/ x'g] ePsf] n] prfO (1) A CB 10 cm
2.
2 pbfx/0f M 3 k"/f
;txsf] If]qkmn ePsf] juf{sf/ lk/fdL8sf] Pp6f e'hf eP 58s] prfO lgsfNg'xf]; . ;dfwfg M oxf“, k"/f ;txsf] If]qkmn juf{sf/ cfwf/sf] Pp6f e'hfsf] nDafO 58s] prfO ;'qfg';f/, k"/f ;txsf] If]qkmn ≠ cfwf/sf] If]qkmn lqe'hsf] ± 4 lqe'hsf] If]qkmn (1) jf, jf, jf, jf, jf, ctM 58s] prfO pbfx/0f M 4 lbOPsf] lqe'hfsf/ lk|Hdsf] cfotg 5 . olb o;sf] prfO / cfwf/ ;de'h lqe'h 5 eg] lqe'hsf] Pp6f e'hfsf] nDafO lgsfNg'xf]; . ;dfwfg M cfoftg prfO cfwf/sf] Pp6f e'hfsf] nDafO ;'q cg';f/, cfoftg cfwf/sf] If]qkmn prfO (1) jf, (1) jf, jf, jf, (1) ctM cfwf/sf] Pp6f e'hfsf] nDafO /x]5 . 6 l 20 cm
3.
pbfx/0f M 5 cfwf/sf]
If]qkmnsf] b'O{ u'0ff jqm;txsf] If]qkmn ePsf] s'g} a]ngfsf] prfO eP ;f] a]ngfsf] cw{Jof; lgsfNg'xf]; . ;dfwfg M a]ngfsf] prfO a]ngfsf] cw{Jof; k|Zg cg';f/, cfwf/sf] If]qkmn ≠ jqm;txsf] If]qkmn (1) jf, jf, jf, (1) ctM cw{Jof; /x]5 . pbfx/0f M 6 ;“u}sf] lrqdf lbOPsf] ;dsf]0fL lqe'hfsf/ cfwf/ ePsf] lk|Hdsf] k"/f ;txsf] If]qkmn lgsfNg'xf]; . ;dfwfg M oxf“, lk|Hdsf] nDafO ℓ ;]=ld= ABC sf] kl/ldlt (P) = 2.5+6.5+6 = 15 ;]=ld= ABC sf] If]qkmn (A) = = 7.5 ju{ ;]=ld= (1) lk|Hdsf] k"/f ;txsf] If]qkmn = ℓ = = 15 + 375 = 390 ju{ ;]=ld= (1) 6.5 ;]=ld= A A' B B' C C'25 ;]=ld= 2.5 ;]=ld= 6 ;]=ld 20 cm
4.
4 pbfx/0f M 7 lbOPsf]
;f]nLsf] (i) jqm;txsf] If]qkmn (ii) k"/f ;txsf] If]qkmn (iii) cfotg, kQf nufpg'xf]; . {gf]6M 5f]6f] pQ/ cfpg] k|Zgdf Pp6f dfq cj:yf ;f]Wg] k|fjwfg 5 . } ;dfwfg M lbOPsf] ;f]nLdf, OP = = = = 48 ;]=ld= (1) (i) jj|m;txsf] If]qkmn (CS) = rℓ ju{ ;]=ld== 2200 ju{ ;]=ld= (1) (ii) k"/f ;txsf] If]qkmn (TS) = r r ℓ = 44 64 = 2816 ju{ ;]=ld= (1) (iii) cfotg (V) = r2h = 3=;]=ld= (1) pbfx/0f M 8 Pp6f a]ngfsf] cw{Jof; 35 ;]=ld= / cw{Jof; / prfOsf] of]ukmn 65 ;]=ld= eP ;f] a]ngfsf] jj|m;txsf] If]qkmn kQf nufpg'xf]; . ;dfwfg M oxf“, j]ngfsf] prfO -h_= 65 – 35 r+h = 65 ;]=ld= = 30 ;]=ld= (1) jj|m;txsf] If]qkmn (CS) = 2rh = 220 30 = 6600 ju{ ;]=ld= (1) pbfx/0f M 9 Pp6f cw{uf]nfsf] k"/f ;txsf] If]qkmn 1039.5 ju{ ;]=ld= eP o;sf] cw{Jof; lgsfNg'xf]; . ;dfwfg M oxf“, uf]nfsf] cw{Jof; (r) = ? cw{uf]nfsf] k"/f ;txsf] If]qkmn (A) = 1039.5 ju{ ;]=ld= A = af6 (1) jf, ju{ ;]=ld= jf, ;]=ld= 50 ;]=ld P O A
5.
r=10.5 ;]=ld=
(1) pbfx/0f : 10 Pp6f a]ngfsf/ 6of+sLdf 4200 ln6/ kfgL 5 . olb pQm 6of+sLsf] cw{Jof; 1.4m eP 6of+sLsf] lk“w b]lv kfgL /x]sf] ;tx ;Ddsf] prfO{ lgsfNg'xf]; . ;dfwfg M lbOPsf], 6of+sLsf] cfotg -kfgL /x]sf] dfq_ (V)= 4200 ln6/ =42001000 cm3 [ ln6/ ] 6of+sLsf] cw{Jof; (r) = 1.4m = 140cm 6of+sLdf /x]sf] kfgLsf] prfO{ (h) = ? ;'qcg';f/, V = r2h (1) or, or, or, h = 68.14cm (1) pQm 6of+sLdf lk“wb]lv kfgL /x]sf] ;tx;Ddsf] prfO{ 68.14 ;]=dL= /x]5 . pbfx/0f M 11 1m nfdf] Ps 6'qmf kmnfdsf] kfOksf] aflx/L cw{Jof; 10cm / leqL cw{Jof; 9cm eP hDdf kmnfdsf] cfotg lgsfNg'xf]; . ;dfwfg M lbOPsf], kfOksf] prfO{ (h) = 1m = 100 cm aflx/L cw{Jof; (r1) = 10cm leqL cw{Jof; (r2) = 9cm kmnfdsf] cfotg (V) = ? ;'qcg';f/, (1) (1) 9 cm 10 cm
6.
6 pbfx/0f : 12 prfO{
12 cm / Pp6f e'hf 8cm ePsf] ;dafx' lqe'hfsf/ cfwf/ ePsf] lk/fld8sf] cfotg lgsfNg'xf]; . ;dfwfg M oxf“, lbOPsf lk/fld8sf] prfO{ (h) = 12cm lqe'hfsf/ cfwf/ ePsf] ;dafx' lqe'hsf] Pp6f e'hfsf] nDafO{ (a) = 8cm lk/fld8sf] cfotg (V) = ? ;'qcg';f/, cfwf/sf] If]qkmn (A) = -hxf“ _ = = 27.71cm2 (1) km]/L, cfotg (V) = cfwf/sf] If]qkmn prfO{ = = V = 110.84 c (1) pbfx/0f : 13 cfwf/sf] cw{Jof; 14cm ePsf] ;f]nLsf] k"/f ;txsf] If]qkmn 1496 cm2 eP 58s] prfO{ kQf nufpg'xf]; . ;dfwfg M lbOPsf], cfwf/sf] cw{Jof; (r) = 14cm k"/f ;txsf] If]qkmn (A) = 880cm2 , 58s] prfO{ (ℓ ) = ? ;'qcg';f/, k"/f ;txsf] If]qkmn = cfwf/sf] If]qkmn ± aqm ;txsf] If]qkmn or, A = r2 + rℓ (1) or, 1496 = or, 1496 – 616 = 44ℓ or, 880 = 44ℓ ℓ=? r=14 cm 8 cm 12 cm
7.
or, = ℓ
ℓ = 20cm (1) dfly lbOPsf pbfx/0fx¿sf] ;xfotfn] lgDg ;d:ofx¿ ;dfwfg ug'{xf]; M 1. / ePsf] ;dlåe'h sf] If]qkmn eP AB sf] gfk lgsfNg'xf]; . -pQ/ M _ 2. / If]qkmn ePsf] sf] sf] sf] gfk lgsfNg'xf]; . -pQ/ M _ 3. k"/f ;txsf] If]qkmn 9856 cm2 ePsf] uf]nfsf] prfO lgsfNg'xf]; . -pQ/ M _ 4. 38.808 cm3 cfotg ePsf] uf]nfsf] prfO lgsfNg'xf]; . -pQ/ M _ 5. k"/f ;txsf] If]qkmn 451 cm2 ePsf] juf{sf/ kL/fld8sf] Pp6f e'hf eP 58s] prfO lgsfNg'xf]; . -pQ/ M _ 6. k"/f ;txsf] If]qkmn 400 cm2 ePsf] juf{sf/ kL/fld8sf] 58s] ;tx eP cfwf/sf] Pp6f e'hfsf] nDafO lgsfNg'xf]; . -pQ/ M _ 7. lbOPsf lqe'hfsf/ lk|Hdsf] cfotg 5 . olb o;sf] prfO / cfwf/ ;de'h lqe'h 5 eg] lqe'hsf] Pp6f e'hfsf] nDafO lgsfNg'xf]; . -pQ/ M _ 8. Pp6f lqe'hfsf/ lk|Hdsf] cfotg 5 . olb o;sf] cfwf/ ;de'h lqe'h 5 h;sf] nDafO eP lk|Hdsf] prfO{ lgsfNg'xf]; . -pQ/ M _ 9. cfwf/sf] If]qkmnsf] tLgu'0ff aqm ;txsf] If]qkmn ePsf] Pp6f j]ngfsf] prfO 12 cm eP ;f] j]ngfsf] cw{Jof; lgsfNg'xf]; . -pQ/ M 8cm_ 10. cfwf/sf] If]qkmnsf] rf/u'0ff aqm ;txsf] If]qkmn ePsf] Pp6f j]ngfsf] prfO 24 cm eP cw{Jof; lgsfNg'xf]; . -pQ/ M 12cm_ A B C 1200 12 cm P Q R 12 cm 25 cm
8.
8 21 ;]=ld= 11. lbOPsf
lqe'hfsf/ lk|Hdx¿sf] k"/f ;txsf] If]qkmn / cfotg lgsfNg'xf]; . (a) (b) -pQ/ M 288 ju{ ;]=ld= / 240 3=;]=ld=_ -pQ/ M 126 ju{ ;]=ld=, 162 3=;]=ld=_ (c) -pQ/ M 144 j=;]=ld=, 300 3=;]=ld=_ gf]6 M 5f]6f] pQ/ cfpg] k|Zgdf If]qkmn jf cfotg s'g} Pp6f dfq ;f]lwg]5 . 12. lbOPsf] cw{uf]nf / ;f]nLsf] jj|m ;tx, k"/f ;txsf] If]qkmn / cfotg lgsfNg'xf]; . (i) (ii) pQ/ M77 ju{ ;]=ld=,115.5 ju{ ;]=ld=,89.83 3=;]=ld= -pQ/M550j=;]=ld=,704j=;]=ld=,12323=;]=ld=_ gf]6 M 5f]6f] pQ/ cfpg] k|Zgdf If]qkmn / cfotg dWo] s'g} Psdfq ;f]lwg]5 . 13. lbOPsf] lk|Hdsf] 58s] ;txsf] If]qkmn lgsfNg'xf]; . -pQ/ M 360 ju{ PsfO _ 14. ;de'hfsf/ lqe'hsf] If]qkmn eP AB sf] gfk kQf nufpg'xf]; . -pQ/ M 6 cm_ 15. Pp6f uf]nfsf/ j:t'sf] cfotg eP To;sf] Jof; slt xf]nf < -pQ/ M 1cm_ A A' B B'10 ;]=ld= P P' Q' P P' Q Q' R R' 8 ;]=ld= 7 ;]=ld= 9 ;]=ld= ;]=ld= C C' 6 ;]=ld= 10 ;]=ld= 10 ;]=ld= =25 ;]=ld= O A h =24 ;]=ld P Q R R' 6 ;]=ld= ;]=ld= A B C 8 ;]=ld= 6 ;]=ld= 15 ;]=ld=
9.
16. lbOPsf] lk|Hdsf]
cfotg 450 cm3 eP prfO{ kQf nufpg'xf]; . -pQ/ M 15 cm_ 17. Pp6f ;f]nLsf] jqm ;txsf] If]qkmn 440cm2 / 58s] prfO{ 14cm eP cw{Jof; slt xf]nf < -pQ/ M 10cm) 18. jqm ;txsf] If]qkmn 210cm2 ePsf] s'g} a]ngfsf] prfO{ 10cm eP cw{Jof; kQf nufpg'xf]; . -pQ/M 10.5cm _ 19. s'g} uf]nfsf] aqm ;txsf] If]qkmn 16cm2 eP uf]nfsf] cw{Jof; slt xf]nf < -pQ/ M 2cm_ 20. k"/f ;txsf] If]qkmn 418cm2 ePsf] ;f]nLsf] cw{Jof; 7cm / cw{Jof; / prfOsf] of]ukmn 19cm eP 58s] prfO kQf nufpg'xf]; . -pQ/ M 12cm_ 21. Pp6f ;f]nLsf] cfotg 13860cm3 / prfO{ 30cm 5 . o;sf] cw{Jof; slt xf]nf < -pQ/ M 21cm_ 22. s'g} a]ngfsf] cw{Jof; / prfO{sf] of]ukmn 17cm / cfwf/sf] kl/lw 44cm eP k"/f ;txsf] If]qkmn kQf nufpg'xf]; . -pQ/ M 748cm2 _ 23. Pp6f ;f]nLsf] 58s] ;txsf] prfO{ 10cm / prfO{ 8cm eP aqm ;txsf] If]qkmn lgsfNg'xf]; . -pQ/ M 188.75 cm2 _ 24. prfO{ 12cm / Pp6f e'hf 10cm ePsf] ;dafx' lqe'hfsf/ cfwf/ ePsf] lk/fld8sf] cfotg lgsfNg'xf]; . -pQ/ M _ 25. Pp6f e'hf 12cm ePsf] ;dafx' lqe'h cfwf/ ePsf] Pp6f lgoldt 6]6«fx]8«g (Regular tetrahodron) sf] k"/f ;txsf] If]qkmn lgsfNg'xf]; . -pQ/ M _ 26. hldg d'lg /x]sf] Pp6f a]ngfsf/ 6of+sLsf] Ifdtf 41580 ln6/ 5 . olb pQm 6of+sLsf] cw{Jof; 2.1cm eP prfO{ kQf nufpg'xf]; . -pQ/ M 3 m_ 27. aflx/L cw{Jof; 7cm / leqL cw{Jof; 6.9 cm ePsf] 14cm nfdf] kfOkdf ePsf] 7f]; j:t'sf] cfotg lgsfNg'xf]; . -pQ/ M 61.16cm3 _ 28. cfwf/sf] cw{Jof; 21cm ePsf] ;f]nLsf] k"/f ;txsf] If]qkmn 3366cm2 eP 58s] prfO{ lgsfNg'xf]; . -pQ/ M 30cm_ 8 cm 10 cm 10 ;]=ld= 6 ;]=ld=
10.
10 29. cfwf/sf] If]qkmn
1386 cm2 / prfO{ 50 cm ePsf] ;f]nLsf] cfotg lgsfNg'xf]; . -pQ/ M 69300 cm3 _ 30. prfO{ / cw{Jof; a/fa/ ePsf] j]ngfsf] cfotg 68992cm3 5 eg] prfO{ slt xf]nf < -pQ/M28 cm_ -v_ nfdf] pQ/ cfpg] k|Zgx¿ M pbfx/0f M 1 ;“u} lbOPsf] lrq ;f]nL / a]ngfåf/f ag]sf] ;+o'Qm 7f]; j:t'sf] xf] . ;f]sf] k"/f ;txsf] If]qkmn / cfotg lgsfNg'xf]; . ;dfwfg M lbOPsf] lrqcg';f/, OP = 54 – 30 = 24 ;]=ld= OA = ;]=ld== 7 ;]=ld= AP = = = 25 ;]=ld= (1) ca, k"/f ;txsf] If]qkmn (TS) = r2 + 2rh + rℓ = r(r+2h+ℓ) (1) = = 22 92 ju{ ;]=ld== 2,024 ju{ ;]=ld= (1) cfotg (V) = r2 h + r2 h1 (1) = r2 = = 154 38= 5,852 3=;]=ld= (1) pbfx/0f M 2 ;“u}sf] lrq Pp6f ;f]nL / Pp6f cw{uf]nf ldn]/ ag]sf] ;+o'Qm 7f]; xf] . ;f] 7f];sf] k"/f ;txsf] If]qkmn lgsfNg'xf]; . ;dfwfg M oxf“, Aof; , cw{Jof; ;+o'Qm 7f];sf] prfO = 31 ;]=ld= ;f]nL cfsf/ efusf] prfO (h) = 31–7=24 ;]=ld= 30 ;]=ld= 54 ;]=ld= 14 ;]=ld= P A O O B A 31 ;]=ld= 14 ;]=ld=
11.
58s] prfO AB
ℓ AB = = = = AB(ℓ) = 25 ;]=ld= (1) tNnf] efu ;f]nLsf] aqm ;txsf] If]qkmn ℓ = 550 ju{ ;]=ld= (1) dflyNnf] efu cw{uf]nfsf] aqm;txsf] If]qkmn = 308 ju{ ;]=ld= (1) t;y{, ;+o'Qm 7f];sf] k"/f ;txsf] If]qkmn = = 550 + 308 = 858 ju{ ;]=ld= (1) pbfx/0f M 3 ;“u} lbOPsf] lrq cfwf/ ju{ ePsf] lk/fld8sf] xf] . ;f]sf] k"/f ;txsf] If]qkmn / cfotg lgsfNg'xf]; . ;dfwfg M OM = BC = ;]=ld== 5 ;]=ld= (1) OP = = = = 12 ;]=ld= (1) k"/f ;txsf] If]qkmn TS ℓ2 + 4 = (BC)2 + 4( CDPM) = (10 ;]=ld=)2 + 2 10 13 ju{ ;]=ld= = 100 ju{ ;]=ld=+ 260 ju{ ;]=ld== 360 ju{ ;]=ld= (1) cfotg (V) = ℓ2h = 10 10 12 3=;]=ld== 400 3=;]=ld= (1) pbfx/0f M 4 Pp6f juf{sf/ cfwf/ ePsf] lk/fld8sf] cfotg 3 4000 cm3 / cfwf/ e'hfsf] cfwf prfO{ eP lqe'hfsf/ ;txx¿sf] If]qkmn lgsfNg' xf]; . ;dfwfg M M DA 13 ;]=ld= CB 10 ;]=ld= O P O
12.
12 lbOPsf] cfotg (V)= 3 4000 cm3 58s]
;txsf] If]qkmn (A) = ? juf{sf/ cfwf/sf] e'hfsf] nDjfO = a cm dfgf} . ctM lk/fld8sf] prfO{ (h) = 2 a cm ;'q cg';f/, (V) = 2 .. 3 1 2 a a (1) or, 2 . 3 1 3 4000 3 a or, 3 8000 a cma 20 (1) km]/L, 58s] prfO kQf nufpg, ON2 = OM2 + MN2 = = = 200 (1) ON = 14.14cm ctM 58s] ;txsf] If]qkmn (A) = = 565.6 cm2 (1) pbfx/0f : 5 Pp6f ;f]nLsf] k"/f ;txsf] If]qkmn 27456cm2 / aqm ;txsf] If]qkmn 17600cm2 eP prfO{ kQf nufpg'xf]; . ;dfwfg, lbOPsf], ;f]nLsf] k"/f ;txsf] If]qkmn = 27456 cm2 = 17600 cm2 prfO{ = ? ca, cfwf/sf] If]qkmn -j[Qsf] If]qkmn_ = k"/f ;txsf] If]qkmn — aqm ;txsf] If]qkmn = 27456 – 17600 = 9856 cm2 (1) a O NMM 10 cm ? cm A BO
13.
cw{Jof; kQf nufp“bf,
A = r2 or, or, or, r=56 cm (1) km]/L, 58s] prfO{ ℓ kQf nufp“bf, A = rℓ or, 17600 = or, ℓ = 100 cm (1) ;f]nLsf] prfO kQf nufp“bf, = 82.84 cm (1) pbfx/0f : 6 Pp6f a]ngfsf] cw{Jof; / prfO{sf] cg'kft 3:4 5 . olb a]ngfsf] cfotg 310464 cm3 eP cw{Jof; slt xf]nf < ;dfwfg M lbOPsf], –––––––––– = cyjf cw{Jof; (r) = prfO{ (h) (1) cfotg (V) = 310464 ;'qcg';f/, V = r2h (1) or, 310464 = or, 175616 = h3 or, h = 56cm (1) km]/L, cw{Jof; kQf nufp“bf, r = = cw{Jof; (r) prfO{ (h)
14.
14 = 42cm (1) pbfx/0f
M 7 ;“u} lbOPsf] lrq cfwf/ ju{ ePsf] lk/fld8sf] xf] . h;sf] 58s] ;txsf] Pp6f lsgf/f 10 ;]=ld=/ 58s] prfO 8 ;]=ld= eP lk/fld8sf] k"/f ;txsf] If]qkmn lgsfNg'xf]; . ;dfwfg M lbPsf], lk/fld8sf] 58s] prfO AB = 8 ;]=ld= Pp6f lsgf/f AC = 10 ;]=ld= -gf]6M ;a} wf/x¿ a/fj/ x'G5g ._ k"/f ;txsf] If]qkmn = ? xfdLnfO{ yfxf 5, kfOyfuf]/; ;fWo cg';f/ jf jf jf jf BC = 6 cm (1) t;y{, cfwf/ e'hf DC = ;]=ld= (1) k"/f ;txsf] If]qkmn = 4 lqe'hx¿sf] If]qkmn + cfwf/sf] If]qkmn (1) =4 DC AB + DC2 =4 12 8 + 122 =192 + 144 =336 cm3 (1) ctM k"/f ;txsf] If]qkmn =336 j=;]=ld= . pbfx/0f M 8 jqm ;txsf] If]qkmn 3960 cm2 / cfotg 41580 cm3 ePsf] s'g] j]ngfsf] prfO kQf nufpg'xf]; . 8 ;]=ld= 10 ;]=ld= D A CB A B C 8 ;]=ld= 10 ;]=ld=
15.
;dfwfg M lbOPsf],
jqm ;txsf] If]qkmn (A) = 3960 cm2 cfotg (V) = 41580 cm3 prfO (h) = ? ca, A = 2rh jf, jf, jf, ………… (i) (1) k]m/L, (1) jf, jf, [ ;= (i) af6] jf, jf, (1) ctM cw{Jof; ;]=ld=, To;}n], ;= (i) af6, jf, ;]=ld=, (1) ctM prfO ;]=ld=, pbfx/0f M 9 jqm ;txsf] If]qkmn 27.72 cm2 ePsf] cw{uf]nfsf] k"/f ;txsf] If]qkmn / cfotg lgsfNg'xf]; . ;dfwfg M jqm ;txsf] If]qkmn (A) =27.72 cm2 k"/f ;txsf] If]qkmn (TSA) = ? cfotg (V) = ? ca, (1) jf, jf, jf,
16.
16 jf, (1) t;y{, cw{Jof; k]m/L,
TSA (1) cfotg kQf nufp“bf, (1) pbfx/0f M 10 tLgcf]6f 7f]; uf]nfx¿nfO{ kufn]/ Pp6f 18 cm cw{Jof; ePsf] 7f]; uf]nf agfOPsf] 5 . olb b'O{cf]6f uf]nfx¿sf] cw{Jof; 2 cm / 12 cm eP t];|f] uf]nfsf] cw{Jof; lgsfNg'xf]; . ;dfwfg M klxnf] uf]nfsf] cfotg (r1) =2 cm, bf];|f] uf]nfsf] cw{Jof; (r2) =12 cm / t];|f] uf]nfsf] cw{Jof; (r3) = ? klxnf] uf]nfsf] cfotg bf];|f] uf]nfsf] cfotg tLgcf]6f uf]nf kufn]/ agfOPsf] 7f]; uf]nfsf] cfotg k|Zg cg';f/, jf, jf, jf, jf, jf,
17.
ctM t];|f] uf]nfsf]
cw{Jof; dfly lbOPsf pbfx/0fx¿sf] ;xfotf lnO{ lgDglnlvt ;d:ofx¿ ;dfwfg ug'{xf]; M 1. lbOPsf ;+o'Qm 7f]; j:t'x¿sf] k"/f ;txsf] If]qkmn / cfotg lgsfNg'xf]; . (i) (ii) pQ/ M 5,600.57 j=;]=ld=, 14,117.01 3=;]=ld= pQ/ M 506 ju{ ;]=ld=, 731.5 3=;]=ld= (iii) (iv) pQ/ M 858 ju{ ;]=ld=1,950.67 3=;]=ld= pQ/ M 792 ju{ ;]=ld=1,848 3=;]=ld= 2. ;“u} lbOPsf] lrq cfwf/ ju{ ePsf] lk/fld8sf] xf] . olb o;sf] k"/f ;txsf] If]qkmn 552 ju{ ;]=ld= / cfwf/sf] ju{sf] nDafO 12 ;]=ld= eP ;f] lk/fld8sf] 58s] prfO kQf nufpg'xf]; . ;fy} o;sf] cfotg ;d]t lgsfNg'xf]; . pQ/ M 25 ;]=ld= 1568 3=;]=ld= 3. ;“u}sf] lrqdf lbOPsf] 7f]; j:t' juf{sf/ cfwf/ ePsf] lk/fld8 xf] . olb PQ=24 ;]=ld= / PC=26 ;]=ld= eP ;f] lk/fld8sf] cfotg lgsfNg'xf]; . pQ/ M 2908 3=;]=ld= 4. Pp6f juf{sf/ cfwf/ ePsf] lk/fld8sf] cfwf/ e'hfsf] nDafO{ 10cm / k"/f ;txsf] If]qkmn 420cm2 eP prfO{ kQf nufpg'xf]; . -pQ/ M 15.19cm_ 5. Pp6f juf{sf/ cfwf/ ePsf] lk/fld8sf] cfotg 4500cm3 / cfwf/ e'hfsf] cfwf prfO{ eP o;sf] lqe'hfsf/ ;txx¿sf] If]qkmn lgsfNg'xf]; . -pQ/ M 1272.6cm2 _ 6. Pp6f e'hf 24 cm nfdf] ePsf] juf{sf/ cfwf/ ePsf] lk/fld8sf] k"/f ;tsf] If]qkmn 1200cm2 eP lk/fld8sf] 58s] prfO{ kQf nufpg'xf]; . -pQ/ M 13cm_ 14 ;]=ld= A P 27 ;]=ld= 12.5 ;]=ld= 15 ;]=ld= 36 ;]=ld= 25 ;]=ld= P P'O x 2x A P M D O A C B 14 ;]=ld= 37 ;]=ld= 15 ;]=ld= 24 ;]=ld= Q D C A P B 26 ;]=ld= 24 ;]=ld=
18.
18 7. 210cm nfdf]
Pp6f kmnfdsf] kfOksf] leqL cw{Jof; 19cm / cfotg 25740cm3 eP aflx/L cw{Jof; kQf nufpg'xf]; . -pQ/ M 20cm_ 8. jqm ;txsf] If]qkmn 12.32cm2 ePsf] Pp6f cw{uf]nfsf] k"/f ;txsf] If]qkmn / cfotg lgsfNg'xf]; . -pQ/ M 18.485cm2 / 5.74cm3 _ 9. 1cm, 6cm / 8cm cw{Jof; ePsf] tLgcf]6f 7f]; uf]nfx¿nfO{ kufn]/ Pp6f cw{uf]nf agfOPsf] 5 . pQm cw{uf]nfsf] cw{Jof; slt xf]nf < -pQ/ M 18cm_ 10. Pp6f ;f]nLsf] k"/f ;txsf] If]qkmn 6864cm2 / jqm ;txsf] If]qkmn 4400cm2 eP ;f]nLsf] prfO{ kQf nufpg'xf]; . -pQ/ M 41.42cm_ 11. s'g} ;f]nLsf] k"/f ;txsf] If]qkmn 3036cm2 / jqm ;txsf] If]qkmn 1650cm2 eP cfwf/sf] cw{Jof; lgsfNg'xf]; . -pQ/ M 21cm_ 12. cfwf/sf] cw{Jof; 7cm / 58s] prfO{ 15cm ePsf] ;f]nLsf] cfotg slt xf]nf < -pQ/ M 680.68cm2 _ 13. Pp6f a]ngfsf] cfwf/sf] cw{Jof; / prfOsf] cg'kft 4:5 5 . olb a]ngfsf] cfotg eP cw{Jof; kQf nufpg'xf]; . -pQ/ M 60cm_ 14. s'g} a]ngfsf] cfwf/sf] cw{Jof; / prfOsf] cg'kft 3:5 5 . olb a]ngfsf] aqm ;txsf] If]qkmn eP cfotg kQf nufpg'xf]; . -pQ/ M 3818.57cm2 _ 15. lbOPsf] sf7sf] a]ngfsf/ k]lG;nsf] sf7sf] Ps efudf cw{uf]nfsf/ O/]h/ c8ofOPsf] 5 . olb k]lG;nsf] sf7sf] nDafO{ 28cm / Jof; 1.4cm 5 eg] k"/f k]lG;nsf] cfotg lgsfNg'xf]; . -pQ/ M 43.83cm3 _ 16. Pp6f ;f]nLsf] cw{Jof; 14cm / k"/f ;txsf] If]qkmn 1848cm2 eP prfO{ slt xf]nf < -pQ/ M 24.24cm_ 17. 58s] ;txsf] Pp6f wf/ 13cm / 58s] prfO 12cm ePsf] juf{sf/ kL/fld8sf] k"/f ;txsf] If]qkmn lgsfNg'xf]; . -pQ/ M 260 cm2 _ 18. 58s] prfO 4cm ePsf] juf{sf/ lk/fdL8sf] k"/f ;txsf] If]qkmn 84cm2 eP cfwf/sf] Pp6f e'hfsf] nDafO lgsfNg'xf]; . -pQ/ M 6 cm_ 19. jqm ;txsf] If]qkmn 3080 cm2 / cfotg 21560 cm3 ePsf] s'g} j]ngfsf] prfO kQf nufpg'xf]; . -pQ/ M 35cm_ 28 ;]=ld= 1.4 ;]=ld= 12 ;]=ld= 13 ;]=ld=
19.
20. cfotg 11000
cm3 / jqm ;txsf] If]qkmn 2200 cm2 ePsf] j]ngfsf] prfO kQf nufpg'xf]; . -pQ/ M 35cm_ 21. jqm ;txsf] If]qkmn 1232 cm2 ePsf] cw{uf]nfsf] k"/f ;txsf] If]qkmn / cfotg kQf nufpg'xf]; . -pQ/ M 1848 cm2 , 5749.33 cm3 _ 22. tLgcf]6f 7f]; uf]nfx¿nfO{ kufn]/ Pp6f 12 cm cw{Jof; ePsf] 7f]; uf]nf agfOPsf] 5 . olb b'O{cf]6f uf]nfx¿sf] cw{Jof; 6 cm / 8 cm eP t];|f] uf]nfsf] cw{Jof; lgsfNg'xf]; . -pQ/ M 10cm_
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