Question

How does a train, 200m long, travelling at a speed of 81km/h takes to cross a stationary train 250 m long​

Answer 1

Answer:

TIME TAKEN TO CROSS THE STATION IS 20 SECOND.

Step-by-step explanation:

length of train = 200 m

length of station  250 m

speed of train = 81 km/h = 81*5/18 m/sec

                                         = 45/2 m/sec

           time taken = distance/speed

                              = (200+250)/45/2

                              =  450*2/45

                              = 10*2 = 20 sec

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Answer 2

Answer:

Time =distance/speed

Total distance = sum of the length of both trains=200m+250m=450m

Speed =81km/h=81*1000/1*18=405m/8sec

Time = 450÷405/18

=450*18/405

=20

Thus time taken is 20 seconds