Q5 of 32 Page 119

Volume of a cone is 6280 cubic cm and base radius of the cone is 30 cm. Find its perpendicular height. (π = 3.14)

Given: Volume of cone = 6280 cm2

Radius of the base of the cone = 30 cm


The figure is given as:



We know volume of cone is given by,


Volume = πr2h/3


⇒ 3×Volume = πr2h


⇒


⇒


⇒


⇒ h = 6.67


Thus, perpendicular height of cone is 6.67 cm.


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Volume of a cone is 1212 cm3 and its height is 24cm. Find the surface area of the cone.

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