SOLUTION: A small motor on a fishing boat can move the boat 6mph in calm water. When trolling in a river, the amount of time it takes to travel 12 mi. against the river's current is the same

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: A small motor on a fishing boat can move the boat 6mph in calm water. When trolling in a river, the amount of time it takes to travel 12 mi. against the river's current is the same      Log On

Hi,

Let x represent the rate of the current

d = r*t Or t = d/r



cross multiply

24*(6-x) =12*(6+x)

12*6 = 36x

2mph = x, the rate of the current



checking our answer

12mi/4mph = 24mi/8mph = 3 hr