find circumference of inner and outer circle when the radius of outer circle is 21 m and the distance between both the circle is 7 cm.
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Answer:
88 cm , 132 cm
Step-by-step explanation:
Radius of the inner circle = 21 - 7 cm
= 14 cm
circumference of the inner circle = 2piR
= 2×22/7×14
= 88cm
Radius of the outer circle = 21cm
circumference of the outer circle = 2piR
= 2×22/7×21
= 132cm
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