Question

The diameter of a tennis ball is $6.58cm$. What is the volume?

Answer 1

Step 1. Radius of ball:

The diameter of the tennis ball $=6.58cm$

Therefore it radius $\left(r\right)=\frac{6.58}{2}=3.29cm$

Step 2. Volume of the ball:

Since the shape of the tennis ball is same sphere.

Therefore volume of tennis ball$=$volume of sphere

$$\begin{gathered} =\frac{4}{3}{\mathrm{\pi r}}^3 \\ =\frac{4}{3}\mathrm{x}\frac{22}{7}\mathrm{x}{(3.29)}^2\approx 149{\mathrm{cm}}^3\left[\because \pi =\frac{22}{7}\right] \end{gathered}$$

Hence the volume of tennis ball is $149c{m}^3$ (approx)