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Question

The area of the greatest circle which can be inscribed in a square whose perimeter is 120 cm is

A
227×(72)2 cm2
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B
227×(92)2 cm2
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C
227×(152)2 cm2
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D
227×(15)2 cm2
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Solution

The correct option is D 227×(15)2 cm2
Given square whose perimeter is 120 cm.
Then side of square
=1204=30 cm
The radius of the greatest circle which can be inscribed in a square =302=15 cm
Then area of the greatest circle which can be inscribed in a square =πr2=π(15)2=227×(15)2 cm2

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