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If the radius of a circle is doubled, its area becomes:

Class 7Area of a CirclePerimeter and Area

A4 times
B2 times
C3 times
D8 times

Step-by-Step Solution

A

= π*

r^{2}

. Replacing

r

by

2 r

gives π*

(2 r)^{2} = 4 *

π*

r^{2}

, so the area becomes 4 times.

Answer: A) 4 times

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