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6 June, 20:39

A rectangular prism has the following dimensions. length: 8 cm width: 13 cm height: 10.5 cm If all the dimensions of the prism are doubled, what will be its new surface area?

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  1. 6 June, 21:04
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    2596 cm²

    Step-by-step explanation:

    For this problem, it can be easiest to work with the doubled numbers. The area is given by ...

    ... A = 2 (LW + H (L+W))

    Filling in values that are twice those given, the area of the new prism is ...

    ... A = 2 ((16 cm) (26 cm) + (21 cm) ((16 + 26) cm))

    ... = 2 (416 cm² + 882 cm²)

    ... A = 2596 cm²
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