Question 1003479
When a boat traveled downstream from Town A to Town B, the trip took 3 h.
 When the same boat traveled upstream from Town B to Town A, the trip took 3.6 h.
 For each trip, the speed of the boat and the water current were unchanged.
 Let x represent the speed of the boat and let y represent the speed of the water.
:
(a) Write an expression for the distance traveled downstream using 3 h for the time.
3(x+y)
 Then write an expression for the distance traveled upstream using 3.6 h for the time.
3.6(x-y)
:
(b) Set the expressions in Part (a) equal to each other. 
Then solve the equation for y. Show your work.
3(x + y) = 3.6(x - y)
3x + 3y = 3.6x - 3.6y
3y + 3.6y = 3.6x - 3x
6.6y = .6x
y = {{{.6/6.6}}}x
y = {{{1/11}}}x
:
(c) What percent of the boat’s speed is the water current?
{{{1/11}}} * 100 = 9.1%