Question
Train ‘A’ can cross a pole in 7 seconds and a 160 metre long platform in 12 seconds. If the ratio of length of train ‘A’ and train ‘B’ is 2:5, respectively, then find the time taken by train ‘B’ to cross a pole with a speed of 20 m/s.
Solution
Let the length and speed of the train ‘A’ be ‘l’ metre and ‘s’ m/s, respectively. According to question, l = 7s Also, 12s = 7s + 160 Or, 5s = 160 Or, s = 32 Therefore, length of train ‘A’ = 7s = 224 metres Length of train ‘B’ = 160 × (5/2) = 560 metres Required time taken = 560 ÷ 20 = 28 second
More Trains Questions
- A train 120 m long passes a man standing on a platform in 8 seconds. What time (in seconds) will it take to pass completely over a platform 180 m long at t...
- A goods train leaves a station at a certain time and at a fixed speed. After 9 hours, an express train leaves the same station and moves in the same direct...
- Ratio of length of train 'A' to that of train 'B' is 2:3, respectively. The two trains are running in the same direction. Speed of train 'A' and train 'B' ...
- A train 600 metres long is running at a speed of 54 km/hr. If it crosses a tunnel in 1 minute, then the length of the tunnel (in meters) is:
- Length of a train, whose speed is 48 km/h, is 240 metres. Find the time taken (in seconds) by train to cross a bridge of length 360 metres.
- 750 metres long train crosses a man who is moving in the same direction with a certain speed, in 50 seconds. If the same train can cross a tree in 20 secon...
- A train crosses a pole and a platform of length 575 metres in 11 seconds and 34 seconds, respectively. Find the length of train.
- A goods train departs from Jaipur towards Udaipur at 6:00 PM, while a passenger train leaves Udaipur for Jaipur at 9:00 PM. The two trains meet at Jaisalme...
- Two trains ‘T5’ and ‘U5’ of lengths 800 metres and 400 metres respectively are travelling towards each other. Ratio of speed of ‘T5’ to ‘U5’ is 5:3. If the...
- A train moving at a speed of ‘x’ km/h crosses a signal post in 22 seconds and then passes a 300 metre long bridge in 40 seconds. Calculate the total distan...
Relevant for Exams:
