Question

two trains running at 48 km/hr and 54 km/hr in same direction
the length of second train is 120 m and time taken to cross each other is 150 sec from the time they meet.Find the length of first train​

Answer 1

Answer:

30 m

Step-by-step explanation:

Relative speed,

In train problems, If same direction means subtract it. Otherwise add it.

So Train1-Train2 = 54-48 = 6km/hr

change km/hr to m/sec because answer should be in m.

6km/hr------- 5/3 m/sec (Note: km/hr-----m/sec ×5/18

m/sec-----km/hr ×18/5)

X+120

---------. = 150

5/3

X+120 = 150*3/5

X+120 = 90

X=30m