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If the distance between any two moving p...

If the distance between any two moving points at any time be a if V be their relative velocity and u and v be the components of V respectively along and perpendicular to the direction a, then their distance when they are nearest to one another is `(av)/(V)` and the time that elapses before they arrive at their nearest distance is `(au)/( V^(2))`

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The correct Answer is:
`pi - cos ^(-1)`
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