SOLUTION: Sue drove her car at 25 mph for the first part of the trip and then changed her speed to 75 mph for the second part. If the entire trip is 725 miles and took 13 hours, how many hou

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: Sue drove her car at 25 mph for the first part of the trip and then changed her speed to 75 mph for the second part. If the entire trip is 725 miles and took 13 hours, how many hou      Log On

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Question 885462: Sue drove her car at 25 mph for the first part of the trip and then changed her speed to 75 mph for the second part. If the entire trip is 725 miles and took 13 hours, how many hours are traveled at each speed?
Answer by geetha_rama(94) About Me  (Show Source):
You can put this solution on YOUR website!
Let t1 and t2 be the time taken in hours for first part and second part
According to info given
25t1%2B75t2=725
t1%2Bt2=13
Solving above equations we get t1=5hrs and t2 = 8 hours