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Three girls skatting on a circular ice ...

Three girls skatting on a circular ice ground of radius 200 m start from a point P on the edge of the ground and reach a point Q diametrically opposite to P following different paths as shown in Fig . 4.20 . What is the magnitude of the displacement vector for each ? for which girl is this equal to the actual length of path skate ?

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400 m for each ; B
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