SOLUTION: Bill can row 3 mph in still water. It takes him 3 hours 36 minutes to go 3 miles upstream and return. Find the speed of the current. I know this problem is d=rt kind of problem

Question 1108948: Bill can row 3 mph in still water. It takes him 3 hours 36 minutes to go 3 miles upstream and return. Find the speed of the current.
I know this problem is d=rt kind of problem. I did the math and the answer that I came up with 3 mph. Which now thinking about it doesn't sound right.
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = the speed of the current in mi/hr
Let = time in hrs to go upstream
----------------------------------------------
Convert min to hrs:

hrs = total times for both trips
------------------------------------------
Equation for going upstream:
(1)
Equation for going downstream:
(2)
----------------------------------
(2)
(2)
and
(1)
and
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2) mi/hr
The speed of the current is 2 mi/hr
--------------------------------------
check the answer:
(1)
(1)
(1) hrs
and
(2)
(2)
(2)
(2)
(2)
(2)
and
notice that:

and that = hrs which is the total time
Get another opinion if needed

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