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6.
Two trains 140 m and 160 m long run at the speed of 60 km/hr and 40 km/hr respectively in opposite directions on parallel tracks. The time (in seconds) which they take to cross each other, is:
- A.9
- C.10
- B.9.6
- D.10.8
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
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Distance covered in crossing each other = (140 + 160) m = 300 m | |||||||||||||||
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7.
A train 800 meters long is running at a speed of 78 km / hr. If it crosses a tunnel in 1 minute, then the length of the tunnel (in meters) is:
- A.130
- C.500
- B.360
- D.540
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
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Time = 1 minute = 60 sec. | ||||||||||||||||
Let the length of the tunnel be x meters. | ||||||||||||||||
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8.
A 270 metres long train running at the speed of 120 kmph crosses another train running in opposite direction at the speed of 80 kmph in 9 seconds. What is the length of the other train?
- A.230 m
- C.260 m
- E.None of these
- B.240 m
- D.320 m
- Answer & Explanation
- Report
Answer : [A]
Explanation :
Explanation :
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Let the length of the other train be x metres. | ||||||||||||||||
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9.
A train overtakes two persons who are waking 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. The length of the train is:
- A.45 m
- C.54 m
- B.50 m
- D.72 m
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
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Let the length of the train be x metres and its speed be y m/sec. | |||||||||||||||||||||||||||||||||||
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On solving, we get : x = 50. | |||||||||||||||||||||||||||||||||||
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10.
Two trains, one from Howrah to patna and the other from Patna to Howrah, start simultaneously. After they meet, the trains reach their destinations after 9 hours and 16 hours respectively. The ratio of their speeds is:
- A.2 : 3
- C.6 : 7
- B.4 : 3
- D.9 : 16
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
Let us name the trains as A and B. Then, | ||||||||||||||
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