Question

# The area of two circles are in the ratio $$25 : 36$$. Then the ratio of their circumference is _________.

A
6:5
B
3:4
C
4:3
D
5:6

Solution

## The correct option is C $$5 : 6$$$$A_1:A_2=25:36$$Divide by $$\pi$$:$$R_1^2:R_2^2=25:36$$Taking square root of both sides:$$R_1:R_2=5:6$$Multiplying by $$2\pi$$:$$2\pi R_1:2\pi R_2=5:6$$$$C_1:C_2=5:6$$Mathematics

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