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The formula to find the surface area of a rectangular prism is:
2lw + 2lh + 2wh
Plugging in the values:
2(7.4)(5) + 2(7.4)(3.1) + 2(5)(3.1)
= 74 + 45.8 + 31
= 150.8 cm²
The surface area of the rectangular prism is 150.8 cm².