A man can travel 120 miles in either of 2 ways he can travel at a constant rate of 40 miles per hour, or he can travel halfway at 50 miles per hour, then slow down to 30 miles per hour for the second 60 miles. Which way is faster and by how much?
A. The constant rate is faster by 10 minutes or more
B. the constant rate is faster by less than 10 minutes
C. the two ways take exactly the same time
D. the constant rate is slower by less than 10 minutes
E. the constant rate is slower by 10 minutes or more
