A cow is tied to a pole , fixed to the midpoint of a side of squaresearch field of dimensions 40 m × 40 m by means of 14 m m long rope. Find the area of the field that the cow can graze. Find the decrease in the grazing area , if the length of the rope is reduced to 10.5
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the area of the field that the cow can graze
=40×40-π×r×r
=1600-22/7×14×14
=1600-616
=984m
after the length of the rope is reduced
=40×40-3.14×10.5×10.5
=1600-346.185
1253.815
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