The radii of two spheres are in the ratio 1: 2. The ratio of their surface area

Question

The radii of two spheres are in the ratio 1: 2. The ratio of their surface areas is?

Options:

A . 1 : 2

B . 1 : 4

C . 1 : 1.414

D . 3: 8

Answer: Option B

Radii be x and 2x
Ratio of their surface areas

= 1 : 4

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