SOLUTION: The speed of a stream is 6 mph. If a boat travels 88 miles downstream in the same time that it takes to travel 44 miles upstream, what is the speed of the boat in still water?
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Question 941197: The speed of a stream is 6 mph. If a boat travels 88 miles downstream in the same time that it takes to travel 44 miles upstream, what is the speed of the boat in still water?
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
The speed of a stream is 6 mph. If a boat travels 88 miles downstream in the same time that it takes to travel 44 miles upstream, what is the speed of the boat in still water?
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let x=speed of the boat in still water.
(x+6)=speed of the boat downstream.
(x-6)=speed of the boat upstream.
travel time=distance/speed (same for both upstream and downstream)
..
cross-multiply)
88(x-6)=44(x+6)
88x-528=44x+264
44x=792
x=18
speed of the boat in still water=18 mph
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