Math
posted by Isabel .
Farmer Bob is considering buying a new field that is next to one he already owns. The field he is considering is a perfect square. The fence along each side of this square field is made of old logs and is a third of a mile lone. If he can walk at a rate of three miles per hour, how long will it take him to inspect the fence all the way around this field?

Math 
PsyDAG
4 * 1/3 = 4/3 mile is the perimeter. If he can walk at 3mph, then in 20 minutes, he can walk one mile. Another third of a mille would add almost another 7 minutes.
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