Problems on Trains
- 1. The length of the train that takes 8 second to pass a pole where it runs at a speed of 36 km/hr is?
Options- A. 288 meters
- B. 45 meters
- C. 48 meters
- D. 80 meters Discuss
Correct Answer: 80 meters
Explanation:
Speed of the train = (36 x 5)/18 = 10 m/sec.
Distance = (Time x Speed ) = (8 x 10 ) = 80 meters
? Length of the train = 80 meters
- 2. A train 280 meters long is moving at a speed of 60 km/hr. The time taken by the train to cross a platform 220 meters long is?
Options- A. 20 seconds
- B. 25 seconds
- C. 30 seconds
- D. 35 seconds Discuss
Correct Answer: 30 seconds
Explanation:
? Speed of the train = 60 x (5/18) m/sec = 50/3 m/sec
? Time taken by the train to cross the platform
= Time taken by it to cover (280 + 220) m
= (500 x 3/50) sec = 30 sec
- 3. A train 250 meter long, running with a speed of 50 km/hr will pass an electric pole in?
Options- A. 30 seconds
- B. 18 seconds
- C. 72 seconds
- D. 60 seconds Discuss
Correct Answer: 18 seconds
Explanation:
? Speed of the train = 50 x (5/18) = 125/9 m/sec
? Time taken by the train to pass the pole = 250 x (9/125) = 18 sec
- 4. A speed of 16 meters per second is the same as?
Options- A. 40.3 km/hr
- B. 57.6 km/hr
- C. 51.16 km/hr
- D. None of these Discuss
Correct Answer: 57.6 km/hr
Explanation:
16 m/sec = 16 x (18/5) = 57.6 km/hr
- 5. A train moves with the speed of 180 km/hr, then its speed in meters per second is?
Options- A. 5
- B. 30
- C. 40
- D. 50 Discuss
Correct Answer: 50
Explanation:
180 km/hr = 180 x (5/18) = 50 m/sec
- 6. A train running at a certain speed crosses a stationary engine in 20 seconds. To find out the speed of the train, which of the following information is necessary?
Options- A. Only the length of the train
- B. Only the length of the engine
- C. Either the length of the train or the length of the engine
- D. Both the length of the train and the length of the engine Discuss
Correct Answer: Both the length of the train and the length of the engine
Explanation:
Since the sum of the length of the train and the length of the engine is needed, so both the lengths must be known.
- 7. A train 110 metres in length runs through a station at the rate of 36 km per hour. How long will it take to pass a given point?
Options- A. 11 sec.
- B. 12 sec.
- C. 13 sec.
- D. 15 sec. Discuss
Correct Answer: 11 sec.
Explanation:
Speed of the train = 36 km/hr = 36 x (5/18) = 10 m/sec
? Required time = 110/10 = 11 sec
- 8. A train 135 metres long is running with a speed of 54 km per hour. In what time will it pass a telegraph post?
Options- A. 9 sec
- B. 12 sec
- C. 8 sec
- D. 6 sec Discuss
Correct Answer: 9 sec
Explanation:
Distance traveled = length of the train = 135 m
Speed of the train = 54 Km/hr = 54 x 5/18 = 15 m/s.
Time taken by train = 135 / 15 sec. = 9 sec.
- 9. A train 550 metres long is running with a speed of 55 km per hour. In what time will it pass a signal post?
Options- A. 30 sec
- B. 24 sec
- C. 42 sec
- D. 36 sec Discuss
Correct Answer: 36 sec
Explanation:
Distance covered = 550 meter. = 0.55 km
Speed of the train = 55 km/hr
So time taken = 0.55 / 55 =1/100 hr = (60 x 60 )/100 sec = 36 sec
- 10. A train 110 metres long travels at 60 km/hr. How long does it take to cross a telegraph post?
Options- A. 5 sec.
- B. 5.6 sec
- C. 6.6 sec
- D. 6.8 sec Discuss
Correct Answer: 6.6 sec
Explanation:
Time = distance / speed
=110 / {60 x 18/5} = 6.6 sec.
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