Construct a concentric circle of inner diameter $6 c m$ and outer diameter $12 c m$ . Then the width of the annular ring is:

6 c m

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5 c m

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4 c m

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3 c m

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Solution

The correct option is D $3 c m$
first concentric circle have commen centre.
given Diameter of inner and outer circles are 6cm and 12cm respectively.
$r a d i u s$ = $\frac{d i a m e t e r}{2}$

therefore $r_{1} = 3 c m$
$r_{2} = 6 c m$
The width of annular ring= $r_{2} - r_{1}$
= $6 - 3 = 3 c m$
So, option D is the answer.

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Similar questions

Draw two concentric circles of radii 3 cm and 5 cm. Taking a point on the outer circle, construct the pair of tangents to the inner circle.

4 c m

6 c m

2 c m

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A B C D

A B = 5 c m, B C = 6 c m, C D = 4 c m, A D = 3 c m

A C = 5 c m .

4 c m, 5 c m, 12 c m, 3 c m, 6 c m, 8 c m, 0.5 c m

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