Find the volume of a sphere whose radius is:
Question:

Find the volume of a sphere whose radius is:

(i) 2 cm

(ii) 3.5 cm

(iii) 10.5 cm.

Solution:

(i)  Radius (r) = 2 cm

Therefore volume $=4 / 3 \pi r^{3}$

$=4 / 3 \times 22 / 7 \times(2)^{3}$

$=33.52 \mathrm{~cm}^{3}$

(ii) Radius (r) = 3.5 cm

Therefore volume $=4 / 3 \pi r^{3}$

$=4 / 3 \times 22 / 7 \times(3.5)^{3}=179.666 \mathrm{~cm}^{3}$

(iii) Radius (r) = 10.5 cm

Therefore volume $=4 / 3 \pi r^{3}$

$=4 / 3 \times 22 / 7 \times(10.5)^{3}=4851 \mathrm{~cm}^{3}$