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The area of a circle is 616 sq cm, find its circumference?
Let the radius of circle = $$r$$ cm
Area of circle = $$\pi r^2 = 616$$
=> $$\frac{22}{7} \times (r)^2 = 616$$
=> $$(r)^2 = \frac{616 \times 7}{22} = 196$$
=> $$r = \sqrt{196} = 14$$ cm
$$\therefore$$ Circumference of circle = $$2 \pi r$$
= $$2 \times \frac{22}{7} \times 14$$
= $$44 \times 2 = 88$$ cm
=> Ans - (B)
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