a tugboat goes 160 miles upstream in 20 hours. The return trip downstream takes 10 hours. Find the speed of the tugboat without a current and the speed of the current.
algebra - Steve, Monday, June 11, 2012 at 11:51am
if the speed of the boat in still water is x, and the speed of the current is c, then, remembering that distance=speed*time,
20(2c) = 160
c = 4
20(8) = 160
10(16) = 160