Câu 13: GMAT Section 2: Quantitative

Three cars are starting to drive from three corners of a huge axi-cimetrical triangle towards the middle. Car A can travel at a speed of 110 miles per hour, car B can travel 10% less and car C can travel the average speed of the first two cars. If all cars leave at the same time and it took car A 30 minutes to get to the middle, how long approximately after car C reached the middle, did car B reached it?

1. A. About 15 minutes.
2. B. About 10 minutes.
3. C. About 5 minutes.
4. D. About 1.5 minutes. — đáp án hiện tại
5. E. They reached the middle at the same time.