Two trains of length 109m and 91m are moving in opposite directions with velocities 34km/h and 38km/h respectively.In what time the two trains will completely cross each other?
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Answered by
49
see when two object run in opposite direction the redultant velocity =72×5/18=20m/s since velocities are added.
distavelled 91m by train a and 109 m train b .
so total distance =200m so
t=200/20
=10second
HOPE IT WOULD BE HELPFUL AND CHEVK WETHER IT IS RIGHT OR WRONG
distavelled 91m by train a and 109 m train b .
so total distance =200m so
t=200/20
=10second
HOPE IT WOULD BE HELPFUL AND CHEVK WETHER IT IS RIGHT OR WRONG
Answered by
30
The total length of the train is 109 m + 91 m that is 200 metres. Total velocity of the train is 34 km/hr + 38 km/hr that is 72 km/ hr. Converting the speed in metre per second we get (72× (5/18)) m/s that is 20 metre per second. So the time needed to cross the trains are (200/20) secs that is 10m/s.
This process is done by calculating the relative distance and relative speed of the respective bodies.
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