Two trains are each 50m long moving parallel towards each other at speeds 10m/s and 15m/s respectively, at what time will they pass each other
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two trains pass each other by 2 seconds
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Since the two trains are 50m long
Distance is 50+50
=100m
Relative speed=(10+15)m/s
=25m/s
Time=distance covered/speed
=100/25
=4s
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