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11.
In what time will a train 100 metres long cross an electric pole, if tis speed be 144 km/hr?
- A.2.5 seconds
- C.5 seconds
- B.4.25 seconds
- D.12.5 seconds
- Answer & Explanation
- Report
Answer : [A]
Explanation :
Explanation :
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12.
A train moves past a telegraph post and a bridge 264 m long in 8 seconds and 20 seconds respectively. What is the speed of the train?
- A.69.5 km/hr
- C.79 km/hr
- B.70 km/hr
- D.79.2 km/hr
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| Let the length of the train be x metres and its speed by y m/sec. | |||||||||||||
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13.
Two trains, each 100 m long, moving in opposite directions, cross each other in 8 seconds. If one is moving twice as fast the other, then the speed of the faster train is:
- A.30 km/hr
- C.60 km/hr
- B.45 km/hr
- D.75 km/hr
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| Let the speed of the slower train be x m/sec. | |||||||||||||||||||
| Then, speed of the faster train = 2x m/sec. | |||||||||||||||||||
| Relative speed = (x + 2x) m/sec = 3x m/sec. | |||||||||||||||||||
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14.
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
- C.300 m
- B.240 m
- D.None of these
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
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| Length of the train = (15 x 20) m = 300 m. | |||||||||||||
| Let the length of the platform be x meters. | |||||||||||||
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15.
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 meters
- C.324 meters
- E.None of these
- B.180 meters
- D.Cannot be determined
- Answer & Explanation
- Report
Answer : [E]
Explanation :
Explanation :
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