Q. 24.6( 11 Votes )

If the sum of the circumferences of two circles with radii R1 and R2 is equal to the circumference of a circle of radius R, then
A. R1 + R2 = R

B. R1 + R2 > R

C. R1 + R2 < R

D. Nothing definite can be said about the relation among R1, R2 and R.

Answer :

We are given that

Circumference of circle with radius R = Circumference of first circle with radius R1 + Circumference of second circle with radius R2

2πR = 2πR1+ 2πR2

R = R1+ R2

option A is correct.

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