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Four cows are tethered at four corners of a square plot of side 50m, so that’ they just cant reach one another. What area will be left ungrazed.

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Side of square plot (s) = 50m

Area grazed by four cows is area of sectors represented by 1, 2, 3 and 4.

Radius of each quadrant = 25m = r.

Area of square plot = s2=502=2500 m2

Area of ungrazed land = (area of square plot) – 4(area of quadrant)

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