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Question

Four horses are tied with equally long ropes at the four corners of a square field whose side is 140 metre such that they can graze maximum grass without entering the field of one another. Calculate the area of the grass which cannot be grazed by them.

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Solution

The length of the ropes should be 70 m.
Area of the grass (which cannot be grazed)
= Area of ABCD - Area of the circle (radius = 70 m)
=(140)2π(70)2
=1402227×70×70
=1960015400
=4200 sq. m.
1055797_557012_ans_c53b6c0bcc4c49678e538cad3a57682d.jpg

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