A train 120 meters long passes a signal pole in 6 seconds. Find the time it takes to completely cross a platform 240 meters long. MCQ with Answer and Explanation
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Question #1
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Two trains 140 meters and 160 meters long are tracking on parallel routes in opposite directions at 40 km/h and 50 km/h respectively. How long do they take to clear each other?
Correct Answer: Option A
Explanation:
Total distance = 140 + 160 = 300 meters. Relative speed = 40 + 50 = 90 km/h = 90 * (5/18) = 25 m/s. Time taken = 300 / 25 = 12 seconds.
Total distance = 140 + 160 = 300 meters. Relative speed = 40 + 50 = 90 km/h = 90 * (5/18) = 25 m/s. Time taken = 300 / 25 = 12 seconds.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A train 120 meters long passes a pole in 6 seconds. What is the speed of the train in km/h?
Correct Answer: Option D
Explanation:
Speed of train = 120 / 6 = 20 m/s. In km/h = 20 * (18/5) = 72 km/h.
Speed of train = 120 / 6 = 20 m/s. In km/h = 20 * (18/5) = 72 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A commuter sets off from point M at 7 AM walking at 5 km/h. Another departs M at 9 AM in the same direction at 8 km/h. At what distance from M do they meet?
Correct Answer: Option B
Explanation:
By 9 AM, the first commuter has walked for 2 hours, covering 5 * 2 = 10 km. Relative speed = 8 - 5 = 3 km/h. Time taken to meet = 10 / 3 hours. Distance from M = Speed of second commuter * Time = 8 * (10/3) = 80/3 = 26.66 km.
By 9 AM, the first commuter has walked for 2 hours, covering 5 * 2 = 10 km. Relative speed = 8 - 5 = 3 km/h. Time taken to meet = 10 / 3 hours. Distance from M = Speed of second commuter * Time = 8 * (10/3) = 80/3 = 26.66 km.
This question belongs to:
Maths
Time Speed and Distance
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