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A man rows at the rate of 5 mph in still water. If the river runs at

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A man rows at the rate of 5 mph in still water. If the river runs at [#permalink]

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New post 17 Oct 2017, 18:46
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A man rows at the rate of 5 mph in still water. If the river runs at the rate of 1 mph, it takes him 1 hour to row to a place and come back. What is the total distance covered by him in miles?

A) 2
B) 2.4
C) 2.8
D) 4
E) 4.8
[Reveal] Spoiler: OA

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Re: A man rows at the rate of 5 mph in still water. If the river runs at [#permalink]

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New post 17 Oct 2017, 19:03
Let total distance traveled by him is 2x
Speed of man in downstream = (5+1)= 6 mph
Speed of man in upstream= (5-1)= 4mph

\(\frac{x}{6}\)+\(\frac{x}{4}\)= 1

\(\frac{2x+3x}{12}\)= 1

5x= 12; x=\(\frac{12}{5}\)= 2.4

So, total distance traveled by him is 2x= 2*2.4= 4.8

Answer: E.
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Re: A man rows at the rate of 5 mph in still water. If the river runs at   [#permalink] 17 Oct 2017, 19:03
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A man rows at the rate of 5 mph in still water. If the river runs at

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