Question

How to solve the volume of sphere and the area of a cylinder.

Answer 1

Consider a sphere of radius r, then the volume of the sphere is given by,

`V=(4)/(3)\pi* r^3`

Here

`\pi=3.14`

Now let us consider a cylinder of with base radius r and height h, as in the figure,

The area is the total area of the base surface and the niddle surface.

This can be written as,

`A=2\pi(h+r)`

Consider a sphere of radius 2 cm, the volume can be calculated as,

`v=(4)/(3)*3.14*2^3=(4)/(3)*3.14*2*2*2=33.49cm^3`