A person row a distance of 16 km downstream in 2 hours and the same distance upstream in 4 hours. What is the speed of the boat in still water? MCQ with Answer and Explanation
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Question #1
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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?
Correct Answer: Option D
Explanation:
Downstream speed = 6 + 2 = 8 km/h. Time = Distance / Speed = 16 / 8 = 2 hours.
Downstream speed = 6 + 2 = 8 km/h. Time = Distance / Speed = 16 / 8 = 2 hours.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A cyclist covers 400 meters in 1 minute 20 seconds. What is his speed in km/h?
Correct Answer: Option C
Explanation:
Time = 1 minute 20 seconds = 80 seconds. Speed = 400 / 80 = 5 m/s. In km/h = 5 * (18/5) = 18 km/h.
Time = 1 minute 20 seconds = 80 seconds. Speed = 400 / 80 = 5 m/s. In km/h = 5 * (18/5) = 18 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A train 120 meters long passes an entry post light in 6 seconds. How many seconds will it require to cross a terminal platform bridge 240 meters long?
Correct Answer: Option A
Explanation:
Speed of train = 120 / 6 = 20 m/s. Total distance to clear platform bridge layout = 120 + 240 = 360 meters. Time required = 360 / 20 = 18 seconds.
Speed of train = 120 / 6 = 20 m/s. Total distance to clear platform bridge layout = 120 + 240 = 360 meters. Time required = 360 / 20 = 18 seconds.
This question belongs to:
Maths
Time Speed and Distance
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