Calculate the surface area using the given dimensions:
l = 7.8m, w = 3.4m, h = 9m

Answer

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Answer

\(\boxed{254.64}\) square meters is the surface area of the rectangular prism.

Steps

Step 1 ：Given a rectangular prism with length \(l = 7.8m\), width \(w = 3.4m\), and height \(h = 9m\).

Step 2 ：The formula for the surface area of a rectangular prism is \(2lw + 2lh + 2wh\).

Step 3 ：Substitute the given values into the formula: \(2(7.8)(3.4) + 2(7.8)(9) + 2(3.4)(9)\).

Step 4 ：Calculate the surface area to get \(254.64m^2\).

Step 5 ：\(\boxed{254.64}\) square meters is the surface area of the rectangular prism.