Question

Leo needs to drive from Boston to Chicago. He planned to drive for 20 hours at an average speed of 50 mph. But, he drove at an average speed of 60 mph for the first 5 hours. During the remaining part of the trip, his average speed was 50 mph. How much earlier did he arrive in Chicago than he usually planned

Answer 1

Answer: 1 hour

Explanation:

(60-50) * 5 = 50 miles more than planned.

50 miles planned to drive in 1 hour.

So he drove 1 hour faster.