?A trough with trapezoidal cross-sections is formed by turning up the edges of a 30-inch-wide sheet of aluminum (see figure). Find the cross-section of
Chapter 13, Problem 18(choose chapter or problem)
A trough with trapezoidal cross-sections is formed by turning up the edges of a 30-inch-wide sheet of aluminum (see figure). Find the cross-section of the maximum area.
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