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Sides of a right triangular field are 25...

Sides of a right triangular field are 25m, 24m and 7m. At the three corners of the field, a cow, a buffalo and a horse are tied separately with ropes of 3.5 m each to graze in the field. Find the area of the field that cannot be grazed by these animals.

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Electric field can be zero only at the centre of equilateral triangle. Electric field intensities of three identical point charges add together to give zero resultant at the centre. These three vectors are having equal magnitudes and inclined at an angle `120^@` with respect to each other and hence the resultant of the three vectors becomes zero.
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