SOLUTION: If it takes 40 minutes to go 21 miles what is the miles per hour?

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: If it takes 40 minutes to go 21 miles what is the miles per hour?      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 1001797: If it takes 40 minutes to go 21 miles what is the miles per hour?
Found 2 solutions by Cromlix, rfer:
Answer by Cromlix(4381) About Me  (Show Source):
You can put this solution on YOUR website!
Hi there,
40 minutes = 0.67 hrs (2 decimal places)
21 miles/0.67 = 31.34 mph (2 decimal places)
Hope this helps :-)

Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
40/21=60/x
40x=60*21
x=1260/40
x=31.5 mph