Discussion

Explanation:

We know, for frustum of a cone ratio of volume of smaller cone to bigger cone is cube of the ratio of heights.

∴ Volume of smaller coneVolume of larger cone = h/2h3 = 18

⇒ Volume of smaller cone = 18 × 13πr2h

⇒ Volume of smaller cone = 18 × 13 × 227 × 142 × 48 = 1232

Hence, option (b).

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