Chapter 12: Inequalities : Advanced Strategy

[alvintom]

Chapter 12: Inequalities : Advanced Strategy

Question 5 in Problem Set (Advanced)

The solution given is 40 and 51 miles per hour. The explanation given is that
maximum speed = 50 1/9 mph
minimum speed = 40 9/11 mph
Therefore speed must be between 40 and 51 mph.

Is this correct? If the minimum speed is 40 9/11, how can we give the range min value as 40? Should it not be 41 (and hence answer option E)?

[jnelson0612]

Please check out Tim's post in this thread: mgmat-study-guide-3-page-187-question-5-t10388.html