The radii of two circles are in the ratio 3:5, find the ratio between their circumferences
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Answer:
3:5
Step-by-step explanation:
let the radius of circle be 3x and 5x
now there circumference
C1 = 2πr
C1 = 2π3x
C1 = 6πx
C2 = 2πr
C2 = 2π5x
C2 = 10πx
now there ratio
C1/C2
= 6πx/10πx
πx will be cancelled
= 6/10
= 3/5
= 3:5
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