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.

Answer 1

speed of boat --- x mph
speed of current -- y mph

10(x-y) = 180 ---> x-y = 18
5(x+y) = 180 ---> x+y = 36

add them
2x = 54
x = 27
then y = 9

state proper conclusion