Question

a tennis ball is of diameter 7.0 cm. what is its volume

Answer 1

Since a tennis ball is a sphere
volume of sphere =4/3πr^3

Answer 2

Tennis ball is a sphere in shape.

diameter = 7 cm

radius = 7/2 = 3.5 cm

$\text{volume} = \frac{4}{3} \pi {r}^{3} \\ \\ \text{volume} = \frac{4}{3} \times 3.142 \times {3.5}^{3} \\ \\ \text{volume} = 179.618 \: {cm}^{3}$