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Physics-

General

Easy

Question

Three persons $P comma Q$ and $R$ of same mass travel with same speed $u$ such that each one faces the other always. After how much time will they meet each other?

$d / u$ sec
$2 d / 3 u$ sec
$2 d / \sqrt{(3)} u$ sec
$d / \sqrt{3 u}$ sec

The correct answer is: $2 d divided by 3 u$ sec

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