RRB Group-D Model Paper 15 with answers for online practice

Question : 28 of 100

Marks: +1, -0

A sphere of radius r has the same volume as that of a cylinder of radius r. Find the height of the cylinder.

Solution:

Volume of a sphere =

4/3πr^3

Volume of a cylinder =

πr^2h

Given, sphere of radius r has the same volume as that of a cylinder of radius r.
∴

4/3πr^3=πr^2h

⇒ h = 4r/3

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