A man can row 60 km downstream in 6 hours. If the speed of the current is 3 km/hr, then find in what time will he be able to cover 16 km upstream?
Aptitude
Boats and Streams
Choose an option
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A4.5 hours
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B4 hours
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C5 hours
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D5.5 hours
Answer
Correct Answer: 4 hours
Explanation
Downstream speed = 60/6 = 10 km/hr Speed of stream = 3 km/hr Upstream speed = 10 - (2 x 3) = 4 km/hr ∴ Required time = 16/4 = 4 hours.