A man can row 6 km/h in still water. If the speed of the current is 2 km/h, it takes 3 h more in upstream than in the downstream for the same distance. The distance is?
Aptitude
Boats and Streams
Choose an option
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A30 km
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B24 km
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C20 km
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D32 km
Answer
Correct Answer: 24 km
Explanation
Let total distance be x km. According to the question, x/(6 + 2) + 3 = x/6 - 2 ⇒ x/8 + 3 = x/4 ⇒ x/4 - x/8 = 3 ⇒ 2x - x/8 = 3 ∴ x = 8 x 3 = 24 km