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Two fences are made in a grass field as ...

Two fences are made in a grass field as shown in the figure . A cow is tied at the point O with a rope of length 3m.
If there is no fences find the maximum area of grass that cow can graze.

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The sides of a triangular field aré 35 m , 42 m and 47 m , There is a wall around the field, and within it, at each corner a cow is tied with a piece of rope 7 m Iong. What is the total area of the region that the three cows can graze?

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