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Question

Four horses are tied on the four corners of a square field of 14 m length so that each horse can just touch the other two horses. They were able to graze in the area accessible to them for 11 days. For how many days is the ungrazed area sufficient for them?

A
3 days
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B
4 days
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C
5 days
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D
2 days
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Solution

The correct option is A 3 days
Area of the square =14×14=196 sq.m

Area to be grazed =π×72=49π sq.m
Ungrazed area =19649π
Area of 49π sq.m is sufficient to graze for 11 days.
Area of (19649π) sq.m is sufficient to graze for
1149π×(19649π)=44π11
=1411=3 days

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