The ratio of circumference and area of a circle is 2:7.Find its circumference
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2
circumference = 2 pi r
area of a circle = pi r^2
2 pi r / pi r^2 = 2/7
2/ r = 2/7
r= 7
circumference = 2 pi r
2× 22/7 ×7
= 44 answer
Answered by
1
Step-by-step explanation:
circumference/area = 2:7
2πr/πr^2 = 2:7
2/r = 2:7
7×2 = 2r
14 = 2r
r = 14/2
r = 7
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