if the ratius of two circles is 2:5 find the ratio of their circumfrances
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when radius is 2x and 5x
circumference ratio will be 2:5
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║⊕ANSWER⊕║
The ratio of the radii of two circles is 2:5.
Let first circle's radius be '2x' and second circle be '5x'
First circle circumference
Circumference =2πr
= 2 × 22/7 × 2x
= 44/7 × 2x
= (88x)/7 --- α
Second circle circumference
Circumference = 2πr
= 2 × 22/7 × 5x
= 44/7 × 5x
= (220x)/7 ----β
Ratio of two circles circumference = α/β
= 2:5
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