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Two trains, which are moving along diffe...

Two trains, which are moving along different tracks in opposite direction, are put on the same track by mistake. On noticing the mistake, when the trains are 300 m apart the drivers start slowing down the trains. The graphs given below show decrease in their velocities as function of time. The separation between the trains when both have stopped is

A

120m

B

20m

C

60m

D

280m

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