SOLUTION: A man rowed 3 miles upstream in 90 minutes. If the river flowed with a current of 2 miles per hour, how long did the man's return trip take? A)20 minutes B)30 minutes C)45 minut

Algebra ->  Percentages: Solvers, Trainers, Word Problems and pie charts -> SOLUTION: A man rowed 3 miles upstream in 90 minutes. If the river flowed with a current of 2 miles per hour, how long did the man's return trip take? A)20 minutes B)30 minutes C)45 minut      Log On

 

Hi, 

A man rowed 3 miles upstream in 90 minutes

Let r represent the rowing r

D = rt OR r = D/t

(r-2) = 3/1.5 = 2

  r-2 = 2

  r = 4mi/hr

With the current, will travel 6mi/hr

 or 30min