Solve the problem.A bookcase is to be constructed as shown in the figure below. The height of the bookcase is 3 feet longer than the length of a shelf. If 24 feet of lumber is available for the entire unit (including the shelves, but NOT the back of the bookcase), find the length and height of the unit.
A. length = 3 feet; height = 9 feet
B. length = 4.5 feet; height = 7.5 feet
C. length = 10.5 feet; height = 13.5 feet
D. length = 3 feet; height = 6 feet
Answer: D
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