SOLUTION: a salmon swims 100 m in 8min downstream upstream it would take the fish 20 min. what is the rate of the current and the speed of the fish.

Question 947422: a salmon swims 100 m in 8min downstream upstream it would take the fish 20 min. what is the rate of the current and the speed of the fish.
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = the speed of the fish in meters/min
Let = the speed oif the current in meters/min
----------------------
Equation for downstream:
(1)
Equation for upstream:
(2)
--------------------------
(1)
and
(2)
--------------------
Add the equations

and
(1)
(1)
(1)
(1)
The speed of the fish is 8.75 meters/min
The speed oif the current is 3.75 meters/min
----------------
check:
(2)
(2)
(2)
and
(1)
(1)
(1)
(1)
OK

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