Q. 13 A34.4( 7 Votes )

Keeping the radius of a right circular cone same, if the height of it is increased twice, the volume of it will be
A. 100%

B. 200%

C. 300%

D. 400%

Answer :

In 1st case,


Base radius = r


Height = h


Volume, x = πr2h/3


In 2nd case,


Base radius = r


Height = 2h


volume, y = πr2×2h/3 = 2πr2h/3


increase in volume,




= 100%


volume will be 200%

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