Find the ratio of the circumference of two circles
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Answer:
Step-by-step explanation:
We have to find the ratio of the circumferences of two circles which have diameters in the ratio 1:5.
Now we know that the radius is equal to half of the diameter.
If the diameters are in the ratio 1:5 the radius of the circles are in the ratio 1:5.
The circumference of a circle is given by 2*pi*r.
Let the radius of the circles be R1 and R2, we know R1: R2 = 1:5
Multiply R1 and R2 by 2*pi, we get 2*pi*R1 : 2*pi*R2 = 1:5.
Therefore the circumference of the two circles is in the ratio 1:5.
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As we know that : Circumference of Circle = 2πr
Ratio of Circumference of 2 Circles = 2πr/2πr
=> Ratio = 1:1
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