Find the volume of a sphere of diameter 21 cm (Use $ π = \frac{22}{7})$
Answer & explanation
Correct answer: option 4
We know that,
Volume of the sphere = \(\frac{4}{3}\)πr3
We have,
Diameter of the sphere = 21 cm
then the radius of the sphere = \(\frac{21}{2}\)
Volume of the sphere = \(\frac{4}{3}\)πr3
= \(\frac{4}{3}\) × \(\frac{22}{7}\) × (\(\frac{21}{2}\))3
= 4851 cm3