Find the length of rope by which a horse must be tethered in order that it may be able to graze an a...........

Quantitative Aptitude (CDS) Mensuration 2D

Find the length of rope by which a horse must be tethered in order that it may be able to graze an area of 5544 sq. meters?

43m

36m

42m

24m

Clearly, the cow will graze a circular field of area 5544 sq meter.

And radius equal to the length of the rope.

Let the length of the rope be R meters.

Then, πr² = 5544

R² = (5544×7/22) = 1764

R = 42. Length of the rope = 42 m.

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