SOLUTION: A man drives from Capetown to Freetown, a distance of 48km in 45 minutes.  If he drives at 72km/h where the surface is good and 48km/h where it is bad, find the number of kilometer

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: A man drives from Capetown to Freetown, a distance of 48km in 45 minutes.  If he drives at 72km/h where the surface is good and 48km/h where it is bad, find the number of kilometer      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 1120126: A man drives from Capetown to Freetown, a distance of 48km in 45 minutes.  If he drives at 72km/h where the surface is good and 48km/h where it is bad, find the number of kilometers of good surface.
Answer by josgarithmetic(39625) About Me  (Show Source):
You can put this solution on YOUR website!
                  SPEED       TIME      DISTANCE
GOOD ROAD          72         d%2F72             d
BAD ROAD           48         %2848-d%29%2F48        48-d
Total                         3%2F4         48

You can use this equation for d, the distance on the good road:
d%2F72%2B%2848-d%29%2F48=3%2F4