A log 18 ft. long is 2 ft. in diameter at the top end and 3 ft. in diameter at the butt end.
Hint: In (b) the larger end is the square ABCD. What is the smaller end? In (c) one end is the square EFGH. What is the other end?
Compute the cost of lumber necessary to resurface a footbridge 16 ft. wide and 150 ft. long with 2-in. planks, if lumber is \$40 per 1000 board feet. Neglect waste. (One board foot = 1 ft. by 1 ft. by 1 in.)
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