Question

The circumferences of two circles are in the ratio 4 : 5. What is the ratio of their radii?

पर्याय

• 16 : 25

• 25 : 16

• `2 : sqrt(5)`

• 4 : 5

Answer 1

4 : 5

Explanation:

Given,

Ratio of circumferences of two circles = `4/5 = (2πr_1)/(2πr_2)`

`\implies r_1/r_2 = 4/5`

`\implies` r₁ : r₂ = 4 : 5