Question

A 150 m long train is moving at a speed of 60 km/hr .another train moving in the same direction and at a speed of 90 km /hr crosses it in 54 sec .what is the length of the second train.?

Answer 1

60-90
=30-54=
=24 so ans is 24 please tell me if it is not correct

Answer 2

90-60=30km/h*5/18=75/9 metre per second
is the relative speed of two trains.since denominator 9 = 54 so required lenth of two
trains 75*6=450. so lenth of second train is
450-150=300 metre.