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? MCQ with Answer and Explanation
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Question #1
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A train running at the speed of 60 km/h crosses a pole in 9 seconds. What is the length of the train?
Correct Answer: Option A
Explanation:
Speed = 60 * (5/18) = 50/3 m/s. Length = Speed * Time = (50/3) * 9 = 150 meters.
Speed = 60 * (5/18) = 50/3 m/s. Length = Speed * Time = (50/3) * 9 = 150 meters.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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Two trains 120 meters and 180 meters long are running in opposite directions at speeds of 42 km/h and 48 km/h respectively. In what time will they cross each other?
Correct Answer: Option C
Explanation:
Total distance = 120 + 180 = 300 meters. Relative speed in opposite directions = 42 + 48 = 90 km/h = 25 m/s. Time taken = 300 / 25 = 12 seconds.
Total distance = 120 + 180 = 300 meters. Relative speed in opposite directions = 42 + 48 = 90 km/h = 25 m/s. Time taken = 300 / 25 = 12 seconds.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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The speed of a boat downstream is 18 km/h and upstream is 12 km/h. How much distance can the boat cover in still water in 3 hours?
Correct Answer: Option D
Explanation:
Speed of the boat in still water = (Downstream Speed + Upstream Speed) / 2 = (18 + 12) / 2 = 15 km/h. Distance covered in 3 hours = 15 * 3 = 45 km.
Speed of the boat in still water = (Downstream Speed + Upstream Speed) / 2 = (18 + 12) / 2 = 15 km/h. Distance covered in 3 hours = 15 * 3 = 45 km.
This question belongs to:
Maths
Time Speed and Distance
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