Question

a train 180 metre long is moving at 35 km/hours. another train moving in the opposite direction at 25 km/h along a parallel track passes by it in 18s. find the length of the train

Answer 1

Let the length of the another train = x metres
Their relative speed = (35+25) km/hr = (60*5/18) m/Second =50/3
180+x/50/3=18
3(180+x)/50=18
540+3x/50=18
540+3x=900
3x=900-540
3x=360
x=360/3
x=120
Length of another train = 120 m