1. QA03 Compound Interest

2. • Money is said to be lent at Compound
Interest if the interest is not paid as soon as it
falls due, but is added to the principal after a
fixed period, so that the amount at the end of
the period, becomes the principal for the next
period.

3. • When interest is compounded annually:
• Amount =

13. S.I & C.I
• If the difference between Simple Interest and
Compound Interest on a certain sum of money
for 2 years at R% rate is given then
If the difference between simple interest and compound interest on a certain sum
of money at 10% per annum for 2 years is Rs 2 then find the sum.

14. S.I & C.I
• If the difference between Simple Interest and
Compound Interest on a certain sum of money
for 3 years at R% is given then
If the difference between simple interest and compound interest on a certain sum
of money at 10% per annum for 3 years is Rs 2 then find the sum.
Sol:

15. COMPOUND INTEREST
• If sum A becomes B in T1 years at compound
interest, then after T2 years
Rs 1000 becomes 1100 after 4 years at
certain compound interest rate. What will
be the sum after 8 years?
Sum:
Here A = 1000, B = 1100
T1 = 4, T2 = 8