Assume , unless stated otherwise. 4. The radius of a spherical balloon increases from…

MATHEMATICS · Subjective · CBSE · Mathematics · Surface Areas and Volumes · Surface Areas and Volumes

Problem

Assume π=227\pi=\frac{22}{7}, unless stated otherwise. 4. The radius of a spherical balloon increases from 7 cm to 14 cm as air is being pumped into it. Find the ratio of surface areas of the balloon in the two cases.

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