Choose the correct alternative answer for the following question. The ratio of circumference and area of a circle is 2:7. Find its circumference.

Question

KollegeApply · Accepted Answer

Let r be the radius of the circle. Circumference of the circle : Area of the circle = 2 : 7 \Rightarrow 2$\pi$ r/$\pi$ r^2 = $\frac{2}{7}$ \Rightarrow 1/r = $\frac{1}{7}$ \Rightarrow r = 7 $\therefore$ Circumference of the circle = 2$\pi$ r = 2$\pi$ $\times$ 7 = 14$\pi$

AChoose Your Answer