Two balls with masses in the ratio of \( 1: 2 \) moving in opposite...

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Two balls with masses in the ratio of \( 1: 2 \) moving in opposite direction have a head-on elastic collision. If their
\( \mathrm{P} \) velocities before impact were in the ratio of \( 3: 1 \), then velocities

W after impact will have the ratio:
(A) \( 5: 3 \)
(B) \( 7: 5 \)
(C) \( 4: 5 \)
(D) \( 2: 3 \)
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