The speed of a train is 54 km/h. How many meters does it cross in 20 seconds? MCQ with Answer and Explanation
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Question #1
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Excluding regular stops, an express cargo van tracks at 84 km/h and including stops it tracks at 70 km/h. How many minutes does it stop per hour?
Correct Answer: Option A
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
Question #2
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A train 150 meters long is running at 72 km/h. How long will it take to pass a platform of length 250 meters?
Correct Answer: Option D
Explanation:
Speed = 72 * (5/18) = 20 m/s. Total distance = 150 + 250 = 400 meters. Time = 400 / 20 = 20 seconds.
Speed = 72 * (5/18) = 20 m/s. Total distance = 150 + 250 = 400 meters. Time = 400 / 20 = 20 seconds.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A man rows a boat 30 km downstream in 3 hours and returns upstream in 6 hours. Find the speed of the stream.
Correct Answer: Option C
Explanation:
Downstream speed = 30 / 3 = 10 km/h. Upstream speed = 30 / 6 = 5 km/h. Speed of stream = (10 - 5) / 2 = 2.5 km/h.
Downstream speed = 30 / 3 = 10 km/h. Upstream speed = 30 / 6 = 5 km/h. Speed of stream = (10 - 5) / 2 = 2.5 km/h.
This question belongs to:
Maths
Time Speed and Distance
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