SOLUTION: Stu trained for 3 hours yesterday. He ran 15 miles and then biked 44 miles. His biking speed is 7 mph faster than his running speed. What is his running speed in miles per hour?

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: Stu trained for 3 hours yesterday. He ran 15 miles and then biked 44 miles. His biking speed is 7 mph faster than his running speed. What is his running speed in miles per hour?      Log On

The time equation to find r, the running speed, is


 +  = 3  hours


Solve for r.


I solved it MENTALLY.


The answer is  r = 15 miles per hour.