Subject: mathqa
Question: due to construction , the speed limit along an 5 - mile section of highway is reduced from 60 miles per hour to 40 miles per hour . approximately how many minutes more will it take to travel along this section of highway at the new speed limit than it would have taken at the old speed limit ?
Option: 
A: c ) 10
B: a ) 3.12
C: e ) 24
D: b ) 2.5
Answer: D