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In still water, a boat averages 12 miles per hour. It takes the same amount of time to travel 14 miles downstream, with the current, as it does 7 miles upstream, against the cur…
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In still water, a boat averages 12 miles per hour. It takes the same amount of time to travel 14 miles downstream, with the current, as it does 7 miles upstream, against the cur…
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May 18, 2018
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In still water, a boat averages 12 miles per hour. It takes the same amount of time to travel 14 miles downstream, with the current, as it does 7 miles upstream, against the current. What is the rate of the waters current?
Mathematics
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Ron Fessler
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t is equal in both situations ... d = r X t so d/r = t
c is rate of waters current
14(12 - c) = 7(12 + c)
2(12 - c) = 12 + c
24 - 2c = 12 + c
12 = 3c
4 = c The rate of the waters current is 4 miles per hour.
Gregra
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May 23, 2018
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