Two trains, which are moving along different tracks in opposite directions, are put on the same ...

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Two trains, which are moving along different tracks in opposite directions, are put on the same track due to a
\( \mathrm{P} \) mistake. Their drivers, on noticing the mistake, start

W slowing down the trains when the trains are \( 300 \mathrm{~m} \) apart. Graphs given in figure show their velocities as function of time as the trains slow down. The separation between the trains when both have stopped is
(1) \( 120 \mathrm{~m} \)
(2) \( 280 \mathrm{~m} \)
(3) \( 60 \mathrm{~m} \)
(4) \( 20 \mathrm{~m} \)
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