Q6 of 94 Page 231

The curved surface area of a cylindrical pillar is 264 m2 and its volume is 924 m3. Find the diameter and height of the pillar.

We know that,

Curved surface area of cylinder = 2rh


264 = 2


r =


r = m


We also know that,


Volume of cylinder = r2h


= × × × h


= 924 m3


Now,


r =


= = 7 m


Therefore,


Diameter of the pillar, d = 7 × 2 = 14 m


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