The area of a circle is 38.5cm

^{2}. Find its diameter [take (pi = frac{22}{7})]-
**A.**

22cm -
**B.**

14cm -
**C.**

7cm -
**D.**

6cm

##### Correct Answer: Option C

##### Explanation

(pi r^2 = 38.5\

frac{}{} = r^2 = 38.5\

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

r = sqrt{12.25} = 3.5\

diameter = 2r = 2 times 3.5 = 7cm)