Two circles have areas in ratio 49:81 find the ratio of circumference
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Given :
Two circles have areas in ratio 49:81
To Find :
find the ratio of circumference
Solution :
Let the radius of circle 1 be r and radius of circle 2 be R
Area of circle 1 =
Area of circle 2 =
We are given that Two circles have areas in ratio 49:81
So,
Let the ratio be x
So, r = 7x , R= 9x
Circumference of circle 1 =
Circumference of circle 2=
So,the ratio of circumference=
Hence the ratio of circumference is 7:9
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