SOLUTION: A boy can row a boat at a constant rate of 5 mi/hr in still water, as indicated in the figure. He rows upstream for 23 minutes and then rows downstream, returning to his starting p
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Question 838880: A boy can row a boat at a constant rate of 5 mi/hr in still water, as indicated in the figure. He rows upstream for 23 minutes and then rows downstream, returning to his starting point in another 17 minutes. Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! It looks like you want the speed of the current
Let = the speed of the current and
the distance he rows
-----------------------
Rowing downstream:
(1)
Rowing upstream:
(2)
----------------------------
Substitute (1) into (2)
Multiply both sides by
The speed of the current is 3/4 mi/hr
check:
(1)
(1)
and
(2)
(2)
(2)
The one-way distance he rows is 1.629 mi
