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Question

The area of a minor sector of (P,30) is 300cm2. The length of the corresponding arc in ................. cm.

A
20
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B
10
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C
30
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D
40
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Solution

The correct option is A 20
Given : Area of the minor sector =300 cm2
Let l be the length of minor arc
We know that, Area of minor sector =12rl, where r is radius and l is length of minor sector
300=12×30×l
l=300×230=20
Hence, the answer is 20.

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