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# Surface areas and volume

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### Surface areas and volume

1. 1. SURFACE AREASAND VOLUMES
2. 2. CONTENTSSURFACE AREAS AND VOLUMES OF :-CUBOIDCUBECYLINDERCONESPHERE
3. 3. SURFACE AREA Area of square 1 = a x a Area of square 2 = a x a Area of square 3 = a x a Area of square 4 = a x a Area of square 5 = a x a Area of square 6 = a x a Surface Area = Area of all 6 faces = 6a2
4. 4. VOLUME
5. 5. Circumference of a circle = 2πrArea covered by a circle = (2πr) x (h) = 2πrh
6. 6. TOTAL SURFACE AREA
7. 7. VOLUME
8. 8. If we make a cone having radius and heightequal to the radius of sphere. Then a waterfilled cone can fill the sphere in 4 times. r r r V=1/3 πr2h V1 If h = r then V1 = 4V = 4(1/3 πr3) V=1/3 πr3 V1= 4/3 πr3