Mr. Gamez has 180 pecan trees. He had a yield of 52 pounds of pecans per tree. Three-fifths of the pecans are sold as shelled nuts. He cut 5 trees damaged in a storm into logs. He had five logs 10 feet long with a 28-inch diameter at the small end and three logs 14 feet long with a 20-inch diameter at the small end. He used Doyle log rule to find approximate board feet of usable lumber in the logs.

Doyle log rule formula:



Where: BF is the approximate board feet of usable lumber in a log.

d is the diameter of the small end of the log, in.

l is the length of the log, ft.


a. 9,100 lb
b. 3,640 lb
c. 2,472 bf

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