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Car A and Car B leave Los Angeles at the same time on the same route bound for Atlanta, 2,200 miles away. If Car A drives 68 mph for 10 hours a day and Car B drives 75 mph for 8 hours a day, which car will reach Atlanta first and by how much time?
  1. Car B by about 2 hours
  2. Car A by about 10 hours
  3. Car B by about 6 hours
  4. Car A by about 4 hours
Explanation
Answer: B - Car A will reach Atlanta first after driving for a little less than three and one quarter-days (three days, 6 hours) and Car B will reach Atlanta about 10 hours later after driving three and two third-days (three days, 16 hours). Car A travels 680 miles each day; Car B travels 600 miles each day. 2,200 miles divided by 680 miles-per-day is 3.235 days of driving for Car A. 2,200 miles divided by 600 miles-per-day is 3.667 days of driving for Car B.
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