1.

The length of the bridge, which a train 130 metres long and travelling at 45 km/hr can cross in 30 seconds, is:

A. 200 m B. 225 m
C. 245 m D. 250 m
Answer and Explanation
Answer:Option
Explanation: Speed = 45 x 5 m/sec = 25 m/sec. 18 2 Time = 30 sec. Let the length of bridge be x metres. Then, 130 + x = 25 30 2 2(130 + x) = 750 x = 245 m.
2.

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?
A. 120 m B. 240 m
C. 300 m D. None of these
Answer and Explanation
Answer:Option B
Explanation: Speed = 54 x 5 m/sec = 15 m/sec. 18 Length of the train = (15 x 20)m = 300 m. Let the length of the platform be x metres. Then, x + 300 = 15 36 x + 300 = 540 x = 240 m.
3.

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. 1 : 3 B. 3:2
C. 3:4 D. None of These
Answer and Explanation
Answer:B
Explanation: Let the speeds of the two trains be x m/sec and y m/sec respectively. Then, length of the first train = 27x metres, and length of the second train = 17y metres. 27x + 17y = 23 x+ y 27x + 17y = 23x + 23y 4x = 6y x = 3 . y
4.

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

A. 120 metres B. 180 metres
C. 324 metres D. 150 metres
Answer and Explanation
Answer:D
Explanation: Speed= (60 x 5/18) m/sec = (50/3) m/sec. Length of the train = (Speed x Time) = 50 x 9 m = 150 m.
5.

A train 240 m long passes a pole in 24 seconds. How long will it take to pass a platform 650 m long?

A. 65 sec B. 89 sec
C. 100 sec D. 150 sec
Answer and Explanation
Answer:B
Explanation: Speed = 240/24 m/sec = 10 m/sec. Required time = (240 + 650)/10 sec = 89 sec