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A train running at the speed of 60 km/hr crosses a pole in 9 seconds. Find the length of the train.

  • 150 meter
  • 145 meter
  • 140 meter
  • 135 meter

Answer: Option A

Explanation:

Speed = 60*(5/18) m/sec = 50/3 m/sec

Length of Train(Distance) = Speed * Time

=503∗9=150meter

Similar Questions :

1. A train is 100 meter long and is running at the speed of 30 km per hour. Find the time it will take to pass a man standing at a crossing.

  • 10 seconds
  • 12 seconds
  • 14 seconds
  • 16 seconds

Answer: Option B

Explanation:

As we need to get answer in seconds, so never forget to convert speed into meter per second.

Speed = 30 km/hr = 30* 5/18 m/sec
= 25/3 m/sec

Distance = length of train = 100 meter

Required time =
DistanceSpeed=100253=100∗325=12sec

2. A train is 360 meter long is running at a speed of 45 km/hour. In what time will it pass a bridge of 140 meter length.

  • 20 seconds
  • 30 seconds
  • 40 seconds
  • 50 seconds

Answer: Option C

Explanation:

Speed = 45 Km/hr = 45*(5/18) m/sec
= 25/2 m/sec
Total distance = 360+140 = 500 meter

Time = Distance/speed
=500∗225=40seconds

3. Two trains 140 metre and 160 metre long run at the speed of 60 km/hr and 40 km/hr respectively in opposite direction on parallel tracks. What time these will take to cross each other ?

  • 10.7 Seconds
  • 10.8 Seconds
  • 10.9 Seconds
  • 11.8 Seconds

Answer: Option B

Explanation:

Relative Speed = 60+40 = 100 Kmph
= 100*(5/18) = 250/9 m/sec

Distance to be covered = 140 + 160 = 300 metres

Time = Distance/Speed

Time=300∗9250=545=10.8 seconds

4. 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. Find the length of train ?

  • 45 m
  • 50 m
  • 55 m
  • 60 m

Answer: Option B

Explanation:

First person speed = 2*(5/18) = 5/9 m/sec
Second person speed = 4*(5/18) = 10/9 m/sec

Let the length of train is x metre and speed is y m/sec

then,
xy−59=9=>9y−5=x=>9y−x=5.....(i)Also,xy−109=1090y−9x=100.....(ii)from (i) and (ii), we get,x=50


So length of train is 50 metre

5. A train speeds past a pole in 15 seconds and a platform 100 meter long in 25 seconds. What is length of the train ?

  • 140 meter
  • 145 meter
  • 150 meter
  • 155 meter

Answer: Option C

Explanation:

Let the length of the train is x meter and Speed of the train is y meter/second
Then x/y = 15 [because distance/speed = time]
=> y = 15/x

=>x+10025=x15x=150 meters



So length of the train is 150 meters

Read more from - Problems on Trains Questions Answers
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