Two trains A and B of …
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Two trains A and B of length 400m each are moving on two parallel tracks with uniform speed of 72km/hr in the same direction with A ahead of B . The driver of B decides to overtake A and accelerates by 1m/s2 . If after 50sec the guard of B just rushes past the driver of A. What was the original distance between them ?
Posted by Keerthana Arumugasamy 9 years, 2 months ago
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Ankit Kumar 8 years, 11 months ago
suppose initially the distance between the gaurd of A and driver of B be x
initial speed of trains = 72 km/hr = 200m/s
Distance travelled by train A in 50 sec is S1= 200 X 50=10000m
Distance travelled by train B in 50 sec is S2= 200X50+(1/2)1X502=11250m
for the initial distance x between trains
x+400+400=11250-10000
x+800=1250
x=1250-800
x=450m
hence the initial distance between the guard of A and driver of B is 450m
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