SOLUTION: A person is kayaking on a river. His overall speed is 3.1 ​mile(s) per hour against the current and 7.7 ​mile(s) per hour with the current. Find the speed of the current an

Algebra ->  Equations -> SOLUTION: A person is kayaking on a river. His overall speed is 3.1 ​mile(s) per hour against the current and 7.7 ​mile(s) per hour with the current. Find the speed of the current an      Log On


   

Question 1206050: A person is kayaking on a river. His overall speed is 3.1 ​mile(s) per hour against the current and 7.7 ​mile(s) per hour with the current.
Find the speed of the current and the speed the person can paddle in still water.
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
If choose c for the speed of the current and r for person's kayak speed in absence of the current then:
system%28r-c=3.1%2Cr%2Bc=7.7%29

That system is perfectly ready for using Elimination Method to find r and c.