A person can row 6 km/h in still water. If the speed of the stream is 2 km/h, how much time will he take to row a distance of 16 km downstream? MCQ with Answer and Explanation
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Question #1
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A train passes a structural signal box in 8 seconds. If the length of the train is 120 meters, find its speed in km/h.
Correct Answer: Option C
Explanation:
Speed of train = 120 / 8 = 15 m/s. In km/h = 15 * (18/5) = 54 km/h.
Speed of train = 120 / 8 = 15 m/s. In km/h = 15 * (18/5) = 54 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A drone flies at 25 m/s. Find its speed in km/h.
Correct Answer: Option C
Explanation:
To convert m/s to km/h, multiply by 18/5. Speed = 25 * (18/5) = 90 km/h.
To convert m/s to km/h, multiply by 18/5. Speed = 25 * (18/5) = 90 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A train passes a platform 110 meters long in 40 seconds and a boy standing on the platform in 30 seconds. Find the length of the train.
Correct Answer: Option C
Explanation:
Let length of train be L. Speed = L/30. Also, Speed = (L+110)/40. So L/30 = (L+110)/40 => 4L = 3L + 330 => L = 330 meters.
Let length of train be L. Speed = L/30. Also, Speed = (L+110)/40. So L/30 = (L+110)/40 => 4L = 3L + 330 => L = 330 meters.
This question belongs to:
Maths
Time Speed and Distance
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