Question

7. 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 differene
between their radii i.e., (R-r). T.​

Answer 1

Answer:

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

given C1=132cm,and C2=88cm

Since, C1=2πr1

or 132=2*22/7*r1

132/2=22/7*r1

66=22/7*r1

r1=66*7/22

r1=3*7=21cm

since C2=2πr2

so, 88=2*22/7*r2

or,r2=88*7/22*2

r2=2*7=14cm

so, r1-r2=21-14=7cm(answer)