SOLUTION: The second-place winner in a 21-kilometer race finished the race with a time of 1 hour and 45 minutes. What was the runner's average speed?

Algebra ->  Customizable Word Problem Solvers  -> Misc -> SOLUTION: The second-place winner in a 21-kilometer race finished the race with a time of 1 hour and 45 minutes. What was the runner's average speed?      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


   



Question 1146726: The second-place winner in a 21-kilometer race finished the race with a time of 1 hour and 45 minutes. What was the runner's average speed?
Answer by rothauserc(4718) About Me  (Show Source):
You can put this solution on YOUR website!
rate * time = distance
:
rate = distance/time
:
1 hour and 45 minutes = 1.75 hours
:
rate = 21/1.75 = 12
:
The runner's average speed is 12 kilometers/hour
: