Answer to February 2010 Problem
MPH Problem

A roundtrip from Fort Collins, CO to Lubbock, TX and back to Fort Collins is 1,200 miles.
It took Mr. P and his wife 20 hours for the roundtrip
    but those 20 hours included their pit stops.
If they stopped for a total of 1 hour 50 minutes,
how fast did they average (in mph to the nearest tenth) over the whole trip?

Solution to the Problem:

Mr. P and his wife averaged 66.1 mph.

Subtract 1 hour 50 minutes from 20 hours to get 18 hours 10 minutes.
Divide 1200 by 18 hours 10 minutes (or 18.1666... hours) to get 66.055 mph.

Correctly solved by:

1. John Funk Ventura, California
2. Hazen Dickerson Mountain View High School,
Mountain View, Wyoming
3. Sierra West Mountain View High School,
Mountain View, Wyoming
4. Tawny Bugas Mountain View High School,
Mountain View, Wyoming
5. Bo Aimone Mountain View High School,
Mountain View, Wyoming
6. Jacob Harmon Mountain View High School,
Mountain View, Wyoming
7. Makayla Wisenbaker Mountain View High School,
Mountain View, Wyoming
8. Michael Black Mountain View High School,
Mountain View, Wyoming
9. Hannah Black Mountain View High School,
Mountain View, Wyoming
10. Austin Hale Mountain View High School,
Mountain View, Wyoming
11. Michael Brown Mountain View High School,
Mountain View, Wyoming
12. David & Judy Dixon Bennettsville, South Carolina
13. Sam Rho John Handley High School,
Winchester, Virginia