A train 110 meters long is traveling at 60 km/h. How much time will it take to pass a platform 240 meters long? MCQ with Answer and Explanation
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Question #1
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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?
Correct Answer: Option A
Explanation:
Relative speed = 15 - 12 = 3 km/h. Time taken to catch = Initial distance / Relative speed = 0.3 km / 3 km/h = 0.1 hours. Distance covered by thief = Speed of thief * Time = 12 km/h * 0.1 hours = 1.2 km = 1200 meters.
Relative speed = 15 - 12 = 3 km/h. Time taken to catch = Initial distance / Relative speed = 0.3 km / 3 km/h = 0.1 hours. Distance covered by thief = Speed of thief * Time = 12 km/h * 0.1 hours = 1.2 km = 1200 meters.
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Maths
Time Speed and Distance
Question #2
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A car travels a distance of 300 km at a certain speed. If the speed is increased by 15 km/h, it takes 4 hours for the journey. Find the original speed.
Correct Answer: Option B
Explanation:
New speed = 300 / 4 = 75 km/h. Since new speed is original speed + 15 km/h, the original speed = 75 - 15 = 60 km/h.
New speed = 300 / 4 = 75 km/h. Since new speed is original speed + 15 km/h, the original speed = 75 - 15 = 60 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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Excluding operational station stops, a city bus routes at an average of 42 km/h, and including stops its net average speed is 35 km/h. For how many minutes does it stop per hour?
Correct Answer: Option D
Explanation:
Stoppage time per hour = (42 - 35) / 42 = 7 / 42 = 1/6 hour = 10 minutes.
Stoppage time per hour = (42 - 35) / 42 = 7 / 42 = 1/6 hour = 10 minutes.
This question belongs to:
Maths
Time Speed and Distance
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