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- Question
- A train 200 m long is running at a speed of 36 km/hr. It crosses a bridge in 30 sec. What is the length of the bridge?
Options- A. 150m
- B. 200m
- C. 125m
- D. 100m
- Correct Answer
- 100m
ExplanationSpeed in m/sec = 36 km/hr x 5/18 = 10m/sec
Distance covered by train in crossing the bridge = Speed of train in m/sec x time in sec = 10 m/sec x 30 sec = 300 m
Now, we know that
Distance covered by train in crossing the bridge= Length of train + Length of bridge
Therefore, Length of bridge = 300m - 200m = 100m - 1. A train which is 264 meter long passes a pole in 12 sec. Find out the speed of train?
Options- A. 80 km/hr
- B. 80.6 km/hr
- C. 82.2 km/hr
- D. 79.2 km/hr Discuss
- 2. A train is running at the speed of 264 Km/hr. If the length of the train is 330m, then how long will it take to cross a platform which is 330m long?
Options- A. 9 sec
- B. 11 sec
- C. 12 sec
- D. 15 sec Discuss
- 3. A 200 m long train is running at a speed of 60 km/ hr. Find out the time it takes to pass a man standing at the platform
Options- A. 10 sec
- B. 12 sec
- C. 15 sec
- D. 18 sec Discuss
- 4. Two trains running at 36 km/hr and 54 km/hr are running parallel in the opposite direction. If their lengths are 200m and 300m respectively. Then how much time will they take to cross each other?
Options- A. 20 sec
- B. 25 sec
- C. 30 sec
- D. 35 sec Discuss
- 5. A train crosses a pole in 10 sec and a 200m long platform in 20 sec. What is the length of the train?
Options- A. 100m
- B. 200m
- C. 250m
- D. 300m Discuss
- 6. A train which 360m long takes 36 sec to cross a telegraph pole. How long will it take to cross a 600m long platform?
Options- A. 60 sec
- B. 45 sec
- C. 66 sec
- D. 50 sec Discuss
- 7. A passenger train running at a speed of 72 km/hr crosses a 400m long platform in 30 sec. What is the length of the train?
Options- A. 200 m
- B. 150 m
- C. 180 m
- D. 240 m Discuss
- 8. The length of train is equal to the length of the platform. Suppose the train is running at a speed of 72 km/hr and it crosses a platform in 2 minutes. What is then the length of the train?
Options- A. 620 m
- B. 500 m
- C. 550 m
- D. 600 m Discuss
- 9. A train takes 24 sec to cross a 480 m platform and 36 sec to cover a 900 m platform. what is the length of the train?
Options- A. 360 m
- B. 400 m
- C. 390 m
- D. 430 m Discuss
- 10. A 200 m long rain is running at a speed of 54 km/hr. On the parallel and a different track, another train 300 m long is running at a speed of 72 km/hr. Both the trains are running in the same direction. Find out how much will it take the train to cross each other?
Options- A. 90 sec
- B. 100 sec
- C. 120 sec
- D. 150 sec Discuss
Problems on Trains
Search Results
Correct Answer: 79.2 km/hr
Explanation:
Length of train = 264 m
Time taken to cross the pole = 12 sec
Speed of the train, in m/sec = Length of the train/ Time taken to cross the pole
Therefore, speed in m/sec= (264 / 12) m/sec = 22 m /sec
Calculating speed in km/ hour = (22 m/sec ) x 18/5 = 396/5 km/hr = 79.2 km/ hour
Correct Answer: 9 sec
Explanation:
Speed of the train = (264 x 5/18) m/sec = 220/3 m/sec
Distance covered in passing the platform = (330+330) m= 660m
Time taken= ( 660 / (220/3) ) sec = (660 x 3/ 220 ) = 9 sec
Correct Answer: 12 sec
Explanation:
Speed of the train = (60 x 5/18) m/sec = 50/3 m/sec
Distance covered in passing the standing person = 200m
Required time taken= =200/(50/3) = 200 x (3/50) = 12 sec
Correct Answer: 20 sec
Explanation:
Relative speed, when the trains are running in the opposite direction = Sum of the speed
Therefore, Relative speed = 36 km/hr +72 km/hr = 90 km/hr
Relative speed in m/sec = 90 km/hr x 5/18= 25 m/sec
Distance covered = sum of the lengths of the train = 200 m+ 300 m = 500m
Therefore, time taken = 500m / 25 m/sec = 20 sec
Correct Answer: 200m
Explanation:
Let the length of train be x meter and speed be y m/sec
Therefore, time taken to cross the pole = x/y sec
and time taken to cross the platform = ( Length of train + Length of platform) / speed of train
Therefore x/y = 10
And, (x+200) / y = 20
? 10y + 200 = 20 y
? speed of train, y = 20 m/sec
And length of rain = x = 10y = 200m
Correct Answer: 60 sec
Explanation:
Speed of train in m/sec = 360m / 36 sec = 10 m/sec
Distance covered by train in crossing the platform = Length of train + Length of Platform = 360m + 240m = 600m
Therefore, Time taken to cover this distance = 600m /(10 m/sec)
= 60 sec
Correct Answer: 200 m
Explanation:
Speed of train in m/sec = 72 km/hr x 5/18 = 20 m/sec
Distance covered in meter = Time taken in crossing the platform in sec x speed in meter = 30 sec x 20 m/sec = 600m
Now, we know , Distance covered by train in crossing the platform = Length of train + Length of Platform
Therefore, length of the train = 600m - 400m = 200m
Correct Answer: 600 m
Explanation:
Speed in m/sec = 36km/hr x (5/18) = 10 m/sec
Given, Time taken by train to cross the platform = 2 min = 120 sec
Therefore, the distance covered by train in crossing the platform = 10 m/sec x 120 sec = 1200 m
Now, distance covered by train in crossing the platform = Length of train + Length of Platform
Given, Length of train = Length of Platform = x
Therefore, 2x = 1200
so, x = Length of train = 1200/2 = 600 m
Correct Answer: 360 m
Explanation:
Let the length of the train be x meter and its speed be y m/sec
Then, (x + 480 m) / 24 sec = y ....(i)
and , (x + 720 m) / 36 sec = y ....(ii)
From Eqs (i) and (ii)
(x + 480) / 24 = (x + 900) / 36
? 3x + 1440 = 2x + 1800
? Length of train, x= 360m
Correct Answer: 100 sec
Explanation:
We know that, when the trains are moving in the same direction,
Relative speed= Difference between the speed of train
and total distance for crossing each other = Sum of the length of train
Therefore, Relative speed = 72 km/hr - 54 km /hr = 18 km/hr
Relative speed in m/sec = 18 km/hr x 5/18 = 5 m/sec
and Total distance = 200m + 300m = 500m
and Total time taken to cross each other = Total distance in meter/ Relative speed in m/sec
= 500 m / (5 m/sec) = 100 sec
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