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Two elastic bodies \( \mathrm{P} \) and \( \mathrm{Q} \) having equal masses are moving along the same line with velocities of
\( \mathrm{P} \) \( 16 \mathrm{~m} / \mathrm{s} \) and \( 10 \mathrm{~m} / \mathrm{s} \) respectively. Their velocities

W after the elastic collision will be in \( \mathrm{m} / \mathrm{s} \) :
(1) 0 and 25
(2) 5 and 20
(3) 10 and 16
(4) 20 and 5
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