15. The area of a circle is 49π cm. Its circumference is
(a) 7π cm (b) 14π cm (c) 2π cm (d) 28π cm
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Answer:
.14π cm
Explanation:
let the radius be r cm
area of circle =
πr^2 = 49π
r ^2 = 49
r = √49
r = 7
circumference = 2π
= (2 *22/7 * x7) cm
=14 cm
hope it helps u
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