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08-11-2016
Mathematics

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A powerboat takes 30 minutes to travel 10 miles downstream. The return trip takes 50 minutes. What is the speed of the current

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08-11-2016

s = d/t
s = 10 + x / 1.33

30 = 10
1 = 1/3
50 = 50/3

s = 10 + 50/3 ÷ 1.33
s = 80/3 ÷ 1.33
s = 0.2 km/h

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