Q13 of 24 Page 227

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

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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