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Three girls skating on a circular ice gr...

Three girls skating on a circular ice ground of radius 200 m start from a point P on the edge of the ground and a point Q diametrically opposite to P following different paths as shown in figure. What is the magnitude of the placement for each ? For which girl is this equal to the actual to the actual length of path skate ?

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Since displacement is independent of path, the displacement is the shortest distance between initial position & final position. So the displacement for each girl will be 400 m. For girl 'B' the displacement will be equal to actual path length
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