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OpenStudy (anonymous):
Rusty has a boat goes 12 mi. an hour. Find the current speed of the river if he can go 3 mi. upstream in the same time as he goes 5 mi. downstream. Please show work
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OpenStudy (anonymous):
your speed*time=distance traveled so: 3=(12-x)t and 5=(12+x)t solve for t in both equations 3/(12-x)=t 5/(12+x)=t substitute: 3/(12-x)=5/(12+x) cross multiply 3(12+x)=5(12-x) 36+3x=60-5x 8x=24 x=3 so stream current is 3 miles/hr downstream
OpenStudy (anonymous):
thats what I got. I just wanted a second opinion!!! Thanks!!!
OpenStudy (anonymous):
no prob
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