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The length of a rope in meter by which a cow must be tethered in order that she may be able to graze an area of 2826 sq.m is ?

The length of a rope in meter by which a cow must be tethered in order that she may be able to graze an area of 2826 sq.m is ? Correct Answer 30 mts

The cow can graze an area of 2826 sq.m i.e it is able to cover area of circle of 2826 sq.m

 

Therefore, πr2 =2826r2 =(2826×7/22) = 899.18 = 900r = 30 m.

 

Therefore, the radius of the circle implies the length of the rope = 30 mts.

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