Find the length of a rope by which a cow must be tethered in order that it may be able to graze an area of 154 sq m.

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Accepted Answer

Length of to the rope = Radius of circle According to the question, πr2 = 154 ∴ r2 = 154 x (7/22) = 7 x 7 = 49 ∴ r = √49 = 7 m

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