SOLUTION: Jose left the White House and drove toward the recycling plant at an average speed of 40 km/h. Rob left some time later driving in the same direction at an average speed of 48

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: Jose left the White House and drove toward the recycling plant at an average speed of 40 km/h. Rob left some time later driving in the same direction at an average speed of 48       Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


   



Question 832678: Jose left the White House and drove toward
the recycling plant at an average speed of 40
km/h. Rob left some time later driving in
the same direction at an average speed of 48
km/h. After driving for five hours Rob
caught up with Jose. How long did Jose
drive before Rob caught up?

Answer by josgarithmetic(39616) About Me  (Show Source):
You can put this solution on YOUR website!
Jose left earlier and traveled for more time than did Jose.

____________speed____________time______________distance
Jose________40_______________t+5_______________(____)
Rob_________48________________5_______________48%2A5=240 km


They both drove the same distance, so....
____________speed(km/hour)____________time______________distance(kilometers)
Jose________40_____________________t+5_______________(240)
Rob_________48______________________5_______________48%2A5=240 km

The equation from the table is highlight%2840%28t%2B5%29=240%29;
Solve for t, and then add 5.
-
Divide left and right by 40,
t+5=6
t=1