Two trains 200 metres and 175 metres long are running on parallel line

Two trains 200 metres and 175 metres long are running on parallel lines.
They take 7 1 seconds.when running in opposite directions
2

and 37 1 seconds when running in the same direction
2
to pass each other. Find their speeds in km per hour.

118 kmph ; 75 kmph

108 kmph ; 72 kmph

120 kmph ; 75 kmph

125 kmph ; 80 kmph

Answer» C. 120 kmph ; 75 kmph

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Two trains 200 metres and 175 metres long are running on parallel lines.They take 71 seconds.when running in opposite directions 2 and 371seconds when running in the same direction2to pass each other. Find their speeds in km per hour.

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Two trains 200 metres and 175 metres long are running on parallel lines.
They take 7 1 seconds.when running in opposite directions
2

and 37 1 seconds when running in the same direction
2
to pass each other. Find their speeds in km per hour.