Question

The ratio between the area of two circles is 4 : 7. What will be the ratio of their radii?

• A. $$2 : \sqrt{7}$$
• B. 4 : 7
• C. 16 : 49
• D. $$4 : \sqrt{7}$$

Answer 1

Answer:

$$2 : \sqrt{7}$$

$\pi{r^2_1}:\pi{r^2_2}=4:7$

$r_1:r_2=\sqrt{4}:\sqrt{7}$

=>2:\sqrt{7}