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May 29th, 2013, 05:36 PM   #1
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What is the ferryboat speed in still water?

It takes a ferryboat 2 hours to travel 30 miles going downstream and 3 hours for the return trip upstream. What is the ferryboat speed in still water?

What equation do I need to solve or have in other to deal with these problem?
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May 29th, 2013, 08:02 PM   #2
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Re: What is the ferryboat speed in still water?

f = ferryboat speed, s = stream speed

@(f+s)..................30..................>(2 h)
(3 h)<..................30..................@(f-s)

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May 29th, 2013, 09:02 PM   #3
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Re: What is the ferryboat speed in still water?

Hi


f+s=15 m/h

f-s= 10m/h

2f=25m/h

f=12.5 m/h
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