Question

A 130 m long train is moving in up direction with speed72 km/h. Another train of 120 m long is moving in downdirection with speed of 108 km/h. The time in which secondtrain crosses the first train will be​

Answer 1

Answer: 5 seconds

Explanation:

Total distance traveled = 130 + 120 = 250 m

Relative velocity = 72+108 = 180 x 5/18 =50 m/sec

So, time required to cross = Distance travlled/ Relative velocity = 250/50 =5 seconds