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A 300m long train is moving with uniform velocity of 90 kmper hour. the time taken by the train to cross another train of length 700m moving with same speed in opposite direction is
Asked by upadhyaynikita485 | 23 Dec, 2021, 11:11: PM
Expert Answer
To cross the train coming in opposite direction of length 700 m , distance D travelled by train of length 300 m is
given as
D = ( 300 + 700 ) m = 1000 m
since the trains are moving in opposite direction with equal speed 90 km/hr ,
relative velocity of each train with respect to other is (90+90) km/hr = 180 km/hr = 180 × (5/18) = 50 m/s
Time taken to cross each other = distance / time = 1000 m / 50 m/s = 20 s
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