Question 22

The area of a circle is 38.5 $$cm^2$$ . Find its radius (in cm).

Solution

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

=> Area = $$\pi r^2=38.5$$

=> $$\frac{22}{7}\times r^2=38.5$$

=> $$r^2=38.5\times\frac{7}{22}=12.25$$

=> $$r=\sqrt{12.25}=3.5$$ cm

=> Ans - (C)

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