There are two concentric circles as shown in the adjoining figure. The circumference of outer circle is 132 cm and circumference of the inner circle is 88 cm. Find the difference between their radii i.e., (R - r)
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Answer:
Step-by-step explanation:
Circumference of circle = 2 pie r
Let radius of outer circle be R and of inner circle be r
Therefore ...
circumference of outer circle = 2 pie r
132 = 2*22/7*R
R = 21 cm
Circumference of inner circle = 2 pie r
88 = 2 * 22/7 * r
r = 14 cm
Now difference between R and r = 21-14 = 7 cm
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