If the height of a cone is 18 cm and the volume is 924 cu cm, find the radius of its base.
We have

Given: Height, h = 18 cm
Volume = 924 cm3
We need to find the radius,
Volume of a cone is given by
Volume = 1/3 πr2h
⇒ 
Substituting the given values, we get

⇒ 
⇒ 
⇒ r = √49 = 7 cm
Thus, radius is 7 cm.