(B) For the running track in the shape of a circular ring,let the inner radius be $r_{1} \,m$ and the outer radius be $r_{2} \,m$.Difference of circum

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(B) For the running track in the shape of a circular ring,let the inner radius be $r_{1} \,m$ and the outer radius be $r_{2} \,m$.Difference of circumferences $= 44 \,m$$\therefore 2 \pi r_{2} - 2 \pi r_{1} = 44$$\therefore 2 \pi (r_{2} - r_{1}) = 44$$\therefore 2 \times \frac{22}{7} (r_{2} - r_{1}) = 44$$\therefore r_{2} - r_{1} = \frac{44 \times 7}{2 \times 22}$$\therefore r_{2} - r_{1} = 7 \,m$$\therefore$ The width of the track $= 7 \,m$.

Class 10 Mathematics Areas Related to Circles Mix Examples - Areas Related to Circles

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$A$ running track is in the shape of a circular ring. The difference of its outer circumference and inner circumference is $44\,m$. Then,the width of the track is $\ldots \ldots \ldots \ldots\,m$.

A
$3.5$
B
$7$
C
$11$
D
$22$

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Areas Related to Circles

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Mix Examples - Areas Related to Circles

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In a circle with radius $14 \,cm$,an arc subtends a right angle at the centre. Find the length of this arc,the area of the minor sector,and the area of the minor segment formed by it.

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The circumference of a circle with radius $8.4\,cm$ is $\ldots \ldots \ldots \ldots cm$.

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If the perimeter of a circle is equal to that of a square,then the ratio of their areas is

Medium

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The radius of a circular ground is $90\, m$. Inside it,a road of width $10\, m$ runs around its boundary. Find the area of the road. $(\pi=3.14)$ (in $m^2$)

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$A$ running track is in the shape of a circular ring. The difference of its outer circumference and inner circumference is $44\,m$. Then,the width of the track is $\ldots \ldots \ldots \ldots\,m$.

Similar Questions

$A$ cow is tied with a rope of length $14 \, m$ at the corner of a rectangular field of dimensions $20 \, m \times 16 \, m$. Find the area of the field in which the cow can graze. (in $m^2$)

In a circle with radius $14 \,cm$,an arc subtends a right angle at the centre. Find the length of this arc,the area of the minor sector,and the area of the minor segment formed by it.

The circumference of a circle with radius $8.4\,cm$ is $\ldots \ldots \ldots \ldots cm$.

If the perimeter of a circle is equal to that of a square,then the ratio of their areas is

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