Question

Two trains 'A' and 'B' of length $'l'$ and $'4l'$ are travelling into a tunnel of length 'L' in parallel tracks from opposite directions with velocities 108 km/h and 72 km/h, respectively. If train 'A' takes 35s less time than train 'B' to cross the tunnel then. length 'L' of tunnel is:
(Given L = 60 $l$)

• A. 1800 m
• B. 900 m
• C. 1200 m
• D. 2700 m

Answer 1

Answer: (A)

1800 m

Answer 2

The correct option is(A): 1800 m