Pm091989 wrote:

Until what time the trains run in both direction is not mentioned, how is it possible to calculate the number of train meeting.

Hi

Pm091989Although time is not required here but if you want to calculate the time when trains meet you can do that

as trains are moving in opposite direction, relative speed=40+40= 80

first train from A starts at 8 a.m and travels till 11.05 i.e till 3h 5min when the first train from B leaves

so first train from station A would have traveled 40*3h5min

distance left =80-40*3h5min =x

the remaining distance will be covered at a relative speed of 80 km/h

hence time taken by 1st train from A to meet train from B = x/80+3h5min