SOLUTION: Keisha rowed downstream for 5 miles and back upstream for 3 miles. She rowed an average of 3 times the rate of the current. Write an expression for her total time. This is on co

Question 746167: Keisha rowed downstream for 5 miles and back upstream for 3 miles. She rowed an average of 3 times the rate of the current. Write an expression for her total time.
This is on combining rational expressions with unlike denominators.
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
Keisha rowed downstream for 5 miles and back upstream for 3 miles. She rowed an average of 3 times the rate of the current. Write an expression for her total time.

let current speed be r
rowing speed = 3r
speed up stream = 3r-r=2r
speed down stream = 3r+r=>4r
time down stream = d/r => 5/4r
time upstream = 3/2r
Total time

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