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Find the circumference of the inner and the outer circles, shown in the adjoining figure? $(Take\ \pi=3.14)$
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Academic Mathematics NCERT Class 7

The radius of the outer circle$= 19\ m$

Circumference of the outer circle$= 2\pi r$

$=2\times3.14\times19=3.14\times38\ m$

$=119.32\ m$

The radius of the inner circle

$=19\ m-10\ m=9\ m$

Circumference$=2\pi r=2\times3.14\times9$

$=56.52\ m$

Here the required circumferences are $56.52\ m$ and $119.32\ m$

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Updated on: 10-Oct-2022

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