MAT 116
posted by Samantha .
A tugboat goes 180 miles upstream in 10 hours. The return trip downstream takes 5 hours. Find the speed of the tugboat without a current and the speed of the current.

speed of boat  x mph
speed of current  y mph
10(xy) = 180 > xy = 18
5(x+y) = 180 > x+y = 36
add them
2x = 54
x = 27
then y = 9
state proper conclusion
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