Sainik School Entrance Exam 2021 Solved Paper

Question : 26 of 150

Marks: +1, -0

If the height and the radius of a cone are doubled, the volume of the cone becomes

Solution:

(d) Volume of a Cone

={1}/{3} π r^2 h

When height and radius are doubled.
Then, volume of Cone

={1}/{3} π(2 r)^2 × 2 h

={1}/{3} π 8 r^2 h

So, volume of cone becomes 8 times.

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