A train travelling at a speed of 75 mph enters a tunnel 3½ miles long. The train is ¼ mile long. How long does it take for the train to pass through the tunnel from the moment the front enters to the moment the rear emerges?

Difficulty: Easy

2.5 minutes
3 minutes
3.5 minutes
4 minutes

Correct Answer: 3 minutes

Explanation:

Given

Speed = 75 mph
Tunnel length = 3.5 miles
Train length = 0.25 mile

Total distance to clear tunnel
Distance = 3.5 + 0.25 = 3.75 milesTime (hours) = 3.75 / 75 = 0.05 hTime (minutes) = 0.05 × 60 = 3 minutes

Note: Add train length to tunnel length for full clearance.

← Previous Question Next Question→

More Questions from Problems on Trains

Two trains of equal length are running on parallel lines in the same direction at 46 km/hr and 36 km/hr. The faster train passes the slower train in 36 seconds. The length of each train is:
Two trains 140 m and 160 m long run at the speed of 60 km/hr and 40 km/hr respectively in opposite directions on parallel tracks. The time (in seconds) which they take to cross each other, is:
The length of the bridge, which a train 130 metres long and travelling at 45 km/hr can cross in 30 seconds, is:
A train passes a station platform in 36 seconds and a man standing on the platform in 20 seconds. If the speed of the train is 54 km/hr, what is the length of the platform?
Two trains running in opposite directions cross a man standing on the platform in 27 seconds and 17 seconds respectively and they cross each other in 23 seconds. The ratio of their speeds is:
A train 360 m long is running at a speed of 45 km/hr. In what time will it pass a bridge 140 m long?
A train 240 m long passes a pole in 24 seconds. How long will it take to pass a platform 650 m long?
A train overtakes two persons who are walking in the same direction in which the train is going, at the rate of 2 kmph and 4 kmph and passes them completely in 9 and 10 seconds respectively. The length of the train is:
Two goods train each 500 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.
Two trains, each 100 m long, moving in opposite directions, cross each other in 8 seconds. If one is moving twice as fast the other, then the speed of the faster train is:

Discussion & Comments

No comments yet. Be the first to comment!

Join Discussion