Q. 365.0( 1 Vote )

If the radius of a circle is tripled, the area becomes
A. 9 times

B. 3 times

C. 6 times

D. 30 times

Answer :

Let r be the radius of a circle.

Area of circle = πr2

If radius is tripled, then new radius will be 3r.

Area of new circle = π(3r)2

= 9π2

9 times of original

Hence, the area of a circle becomes 9 times to the original area.

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