SOLUTION: In the morning Maria drove to a business appointment at 70 mph. Her average speed on the returning in the afternoon was 60 mph. The return trip took 1/3 hour longer because of heav
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Question 1071428: In the morning Maria drove to a business appointment at 70 mph. Her average speed on the returning in the afternoon was 60 mph. The return trip took 1/3 hour longer because of heavy traffic. How far did she travel to appointment? Answer by ikleyn(52848) (Show Source):
Let be the distance in one (in each) direction, in miles.
Then your governing equation is
= .
It is the "time equation". Each member of the equation is time.
To solve it, multiply both sides by 60*70. You will get
70D - 60D = 1400, ---> 10D = 1400 ---> D = = 140.
Answer. The distanse is 140 miles.
