Question 22

The area of a circle is $$616 cm^2$$. Find its radius (in cm).

Solution

Let the radius of circle = $$r$$ cm

=> Area = $$\pi r^2=616$$

=> $$\frac{22}{7}\times r^2=616$$

=> $$r^2=616\times\frac{7}{22}$$

=> $$r=\sqrt{28\times7}=2\times7=14$$ cm

=> Ans - (A)

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