Question
The area of a circle is 154 sq cm. Find its
circumference.Solution
ATQ, Area = pi r2 = 154 (22/7)r2 = 154 r2 = 154 x 7 / 22 = 49 r = 7 Circumference = 2pi r = 2 x 22/7 x 7 = 44 cm
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