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Find the circumference of the inner and the outer circles, shown in the adjoining figure? (Take π = 3.14)

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Find the circumference of the inner and the outer circles, shown in the adjoining figure? (Take π = 3.14)

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Circumference of the outer circle = 2πr

radius = 19 m

= 2 × 3.14 × 19

= 119.32 mts

Circumference of the inner circle = 2πr

radius = 19 – 10 = 9 cm.

= 2 × 3.14 × 9

= 56.52 cm

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