August 2011
Problem of the Month
Hiking Problem
The MENSA Puzzle Calendar
Paul hikes 24 km. For the first 4 km, he has traveled at a rate of 2 km/hr.
How fast must he hike the remainder of the distance to average 4 km/hr for the entire journey?
Solution to the Problem:
He must hike 5 km/hr.
Set up a table where Rate x Time = Distance.
| RATE | TIME |
DISTANCE |
| 2 km/hr | 2 hr |
4 km |
| x = 5 km/hr | 4 hr
| 20 km |
| 4 km/hr | 6 hr |
24 km |