The area of a circle is 346.5 cm2. Find its circumference (in cm).
Let the radius of circle = $$r$$ cm
=> Area = $$\pi r^2=346.5$$
=> $$\frac{22}{7}\times r^2=346.5$$
=> $$r^2=346.5\times\frac{7}{22}=110.25$$
=> $$r=\sqrt{110.25}=10.5$$ cm
$$\therefore$$ Circumference = $$2\pi r$$
= $$2\times\frac{22}{7}\times10.5$$
=Â $$44\times1.5=66$$ cm
=> Ans - (C)
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