Question

A tennis ball is of diameter 7.0 cm. what is its volume in (a) cm³ (b) m³?

Answer 1

Answer:

by using formula

volume of sphere=4/3× pie ×r^3

Explanation:

(a)d=7cm

r=3.5cm

volume of tennis ball= 4/3 × 22/7 × (3.5)^3

=179.667cm^3

(b)d=0.07m

r=0.035m

volume of tennis ball=4/3 × 22/7 × (0.035)^3

=0.000179667m^3

I hope this helps you.

Answer 2

Solution :-

$\sf\large{Diameter \: of \: tennis \: ball \: = 7 \: cm}$

$\large\therefore\sf{radius \: of \: tennis \: ball \: (r) = \large\frac{7}{2} \: cm = 3.5 \: cm}$

$\large\sf \: a)\therefore \: volume \: of \: a \: sphere \: (tennis \: ball) = \large\frac{4}{3} \pi \: {r}^{3}$

$\large\sf \: = \frac{4}{3} \times \frac{22}{7} \times 3.5 \times 3.5 \times 3.5$

$\large\sf \: =\underline{ 179.6 \: cm}$

$\large\sf \: b) \: volume \: in \: {m}^{3} = \frac{179.6}{1000000} = \underline { 0.0001796 \: {m}^{3} }$