Question: A trough has a trapezoidal cross section. The vertical side is 3 m in height. There are two horizontal sides perpendicular to the vertical side,

A trough has a trapezoidal cross section. The vertical side is 3 m in height. There are two horizontal sides perpendicular to the vertical side, with the larger horizontal side being at the top and 2 m long, and the shorter side at the bottom is 1 m long. The width of the trough is 6 m.

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