A thief is noticed by a policeman from a distance of 300 meters. The thief runs at 12 km/h and the policeman chases him at 15 km/h. What is the distance run by the thief before he is caught? MCQ with Answer and Explanation
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Question #1
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Two trains 140 meters and 160 meters long are running in opposite directions at speeds of 50 km/h and 58 km/h respectively. In what time will they cross each other?
Correct Answer: Option B
Explanation:
Total distance = 140 + 160 = 300 meters. Relative speed in opposite directions = 50 + 58 = 108 km/h = 30 m/s. Time taken = 300 / 30 = 10 seconds.
Total distance = 140 + 160 = 300 meters. Relative speed in opposite directions = 50 + 58 = 108 km/h = 30 m/s. Time taken = 300 / 30 = 10 seconds.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A train 150 meters long is traveling at a speed of 45 km/h. How much time will it take to clear a platform 300 meters long?
Correct Answer: Option A
Explanation:
Total distance = 150 + 300 = 450 meters. Speed = 45 * (5/18) = 12.5 m/s. Time taken = 450 / 12.5 = 36 seconds.
Total distance = 150 + 300 = 450 meters. Speed = 45 * (5/18) = 12.5 m/s. Time taken = 450 / 12.5 = 36 seconds.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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Excluding minor platform corridor stops, the speed of an express route train is 84 km/h, and including stops it tracks at 70 km/h. How many minutes does it spend resting at stops per hour?
Correct Answer: Option D
Explanation:
Stoppage time per hour = (84 - 70) / 84 = 14 / 84 = 1/6 hour. In minutes = (1/6) * 60 = 10 minutes.
Stoppage time per hour = (84 - 70) / 84 = 14 / 84 = 1/6 hour. In minutes = (1/6) * 60 = 10 minutes.
This question belongs to:
Maths
Time Speed and Distance
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