Two good train each 900 m long, are running in opposite directions on parallel tracks.

Two good train each 900 m long, are running in opposite directions on parallel tracks. Their speeds are 45 km / hr and 30 km /hr respectively. Find the time taken by the slower train to pass the driver of the faster one.

Quiz

Answer/Solution

86.4 sec

Steps/Work

Sol.
Relative Speed = (45 + 30) km / hr
= (75 x 5 / 18) m/sec
= (125/6) m/sec.
Distance covered = (900 + 900) m = 1000 m.
Required time = (1800 x 6 / 125) sec = 86.4 sec.
Answer C

Physics Calculator / Auto Solver

Two good train each m long, are running in opposite directions on parallel tracks. Their speeds are km / hr and km / hr respectively. Find the time taken by the slower train to pass the driver of the faster one.

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