Question

Excellence in Mathemauts
. There are two concentric circles as shown in the following
figure. The circumference of outer circle is 132 cm and
circumference of the inner circle is 88 cm. Find the differences
between their radii i.e., (R - r).​

Answer 1

Answer:

according to question :-

Circumference of outer circle = 132

circumference of inner circle = 88

now

C1-C2 = 2πR 1 - 2πr 2

132-88 = 2π(R1-r2)

44= 2*22/7(R-r)

44*7/2*22 = (R-r)

7 cm = (R-r)

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