A cargo train running at 64 km/h overtakes a cyclist riding at 10 km/h in the same direction in 10 seconds. Find the length of the train. MCQ with Answer and Explanation
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Question #1
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Excluding institutional stops, the speed of an intercity coach is 72 km/h and including stops it is 60 km/h. For how many minutes does the coach stop per hour?
Correct Answer: Option B
Explanation:
Stoppage time per hour = (72 - 60) / 72 = 12 / 72 = 1/6 hour. In minutes = (1/6) * 60 = 10 minutes.
Stoppage time per hour = (72 - 60) / 72 = 12 / 72 = 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 swimmer logs 36 km downstream in 3 hours and tracks the identical course line upstream in 9 hours. Find the net velocity of the stream.
Correct Answer: Option A
Explanation:
Downstream speed = 36 / 3 = 12 km/h. Upstream speed = 36 / 9 = 4 km/h. Speed of stream current = (12 - 4) / 2 = 8 / 2 = 4 km/h.
Downstream speed = 36 / 3 = 12 km/h. Upstream speed = 36 / 9 = 4 km/h. Speed of stream current = (12 - 4) / 2 = 8 / 2 = 4 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A man covers half of his journey at 40 km/h and the remaining half at 60 km/h. What is his average speed?
Correct Answer: Option D
Explanation:
Average Speed = (2 * 40 * 60) / (40 + 60) = 4800 / 100 = 48 km/h.
Average Speed = (2 * 40 * 60) / (40 + 60) = 4800 / 100 = 48 km/h.
This question belongs to:
Maths
Time Speed and Distance
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