A wooden beam has a rectangular cross section of height h and width w (see figure). The
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A wooden beam has a rectangular cross section of height h and width w (see figure). The strength S of the beam is directly proportional to the width and the square of the height. What are the dimensions of the strongest beam that can be cut from a round log of diameter 20 inches? S = kh²w, where k is the proportionality constant.
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W 20 h
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