If the height of a right circular cone is increased by 200 and the radius of the base is reduced by ...........

Quantitative Aptitude (CDS) Mensuration 3D

If the height of a right circular cone is increased by 200% and the radius of the base is reduced by 50%, then the volume of the cone

Remains unaltered

Decreases by 25%

Increases by 25%

Increases by 50%

$Volume \: of \: cone\: = x +y+z+\frac{xy+yz+xz}{100}+\frac{xyz}{100^{2}}$

= 100 +(-100 - 100 +25)+ 50

= 100 -175 + 50 = - 25 %

Decreases by 25%

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