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A cow is tied with a rope of length 7 cm...

A cow is tied with a rope of length 7 cm at the corncr of a triangular field with cach side 15 an. If the length of the rope is increased by 4.5 m, find increase in area of the field in which the cow can graze.

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The correct Answer is:
`((25pi)/(4) +(25)/(2)) cm^(2)`
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