A boat crew row a boat 36 km downstream in 4 hours and tracks the identical loop back upstream in 6 hours. Find the baseline speed of the boat in still water. MCQ with Answer and Explanation
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Question #1
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A train 240 meters long passes a pole in 24 seconds. How long will it take to pass a platform 650 meters long?
Correct Answer: Option B
Explanation:
Speed of train = 240 / 24 = 10 m/s. Total distance to pass platform = 240 + 650 = 890 meters. Time taken = 890 / 10 = 89 seconds.
Speed of train = 240 / 24 = 10 m/s. Total distance to pass platform = 240 + 650 = 890 meters. Time taken = 890 / 10 = 89 seconds.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A train 240 meters long passes a static utility pole in 12 seconds. Find the time it takes to completely pass a platform of length 360 meters.
Correct Answer: Option A
Explanation:
Speed of train = 240 / 12 = 20 m/s. Total distance to pass platform = 240 + 360 = 600 meters. Time taken = 600 / 20 = 30 seconds.
Speed of train = 240 / 12 = 20 m/s. Total distance to pass platform = 240 + 360 = 600 meters. Time taken = 600 / 20 = 30 seconds.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A man rows a distance of 12 km downstream in 1.5 hours and returns upstream in 3 hours. Find the speed of the river current.
Correct Answer: Option A
Explanation:
Downstream speed = 12 / 1.5 = 8 km/h. Upstream speed = 12 / 3 = 4 km/h. Speed of current = (8 - 4) / 2 = 4 / 2 = 2 km/h.
Downstream speed = 12 / 1.5 = 8 km/h. Upstream speed = 12 / 3 = 4 km/h. Speed of current = (8 - 4) / 2 = 4 / 2 = 2 km/h.
This question belongs to:
Maths
Time Speed and Distance
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