Question

The circumference of two cricle in the ratio 4:5.Find the ratio of their areas
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Answer 1

Answer:

4:5

Step-by-step explanation:

let ratio be x

let radii of circles be 4x and 5x

c1= 2^r

c2= 2^r

c1=2^×4x

c2=2^×5x

c1=8^x

c2=10^x

c1/c2=8^x/10^x

c1/c2=4/5

c1:c2=4:5