Q8 of 22 Page 258

The radius of the base of a right circular cylinder is halved and the height is doubled. What is the ratio of the volume of the new cylinder to that of the volume of the original cylinder?

Let the radius & height of the cylinder be r & h respectively.

So, volume of original cylinder = πr2h


A/Q, new radius = r’ = r/2


new height = h’ = 2h


So,


Ratio of volume of new cylinder to that of original cylinder



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