Margaret drove to a business appointment at 70 mph. Her average speed on the return trip was 60 mph. The return trip took 1/3 hr longer because of heavy traffic. How far did she travel to the appointment?

Answer:
70t = 60t + 10
10t = 10
t = 1 hour
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1 hour 70 mi/hr = 70 miles
Step-by-step explanation: