SOLUTION: Paddling 7 miles upstream, Sara and her brother averaged 2 miles per hour. On the way back, their rate of speed was 3.5 miles per hour. How long did it take them to make the round

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: Paddling 7 miles upstream, Sara and her brother averaged 2 miles per hour. On the way back, their rate of speed was 3.5 miles per hour. How long did it take them to make the round       Log On

               speed    time    distance
UPSTREAM         2       u       7
DOWNSTREAM       3.5     b       7
Total                   u+b