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प्रश्न
Find the circumference of the inner and the outer circles, shown in the adjoining figure? (Take π = 3.14)
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उत्तर
Radius of outer circle = 19 m
Circumference = 2πr
= 2 × 3.14 × 19
= 119.32 m
Radius of inner circle = 19 − 10
= 9 m
Circumference = 2πr
= 2 × 3.14 × 9
= 56.52 m
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