two trains each 50m long are travelling in oppsite direction with velocity 10m/s and 15m/s the time of crossing is
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distance of crossing =50m+50m=100m
relative velocity of train travelling in opposite direction=10m/s+15m/s=25m/s
t=d/s
t=100m/25msec^-1
t=4sec
relative velocity of train travelling in opposite direction=10m/s+15m/s=25m/s
t=d/s
t=100m/25msec^-1
t=4sec
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