The radius of a circle whose circumference is equal to the two circle of diameter is36 and20
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Circumference =2πr
given = circumference of a circle is equal to the radius of 2 circle of diameter 36 and 20 cm
r1= 36/2 = 18 CM ................( 1)
r2 = 20/2 = 10 CM................. (2)
let the radius of the circle is R
Circumference = 2πr1+ 2πr2
= 2*22/7*18 + 2*22/7 *10
= cancel 2π both the sides
R = 18 + 10 cm
R = 28 CM
The radius of the circle is 28 cm
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