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20 September, 12:51

A rectangular prism has the following dimensions. length: 18 inches width: 1 foot height: 14 inches If all the dimensions of this prism are tripled, what will be the surface area of the new figure?

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  1. 20 September, 13:06
    0
    The formula for surface area of a rectangular prism is A = 2 (wl + hl + hw)

    plugging in the values, you get A = 2 (12 x 3) (18 x 3) + (14 x 3) (18 x 3) + (14 x 3) (12 x 3)

    A = 2 (36) (54) + (42) (54) + (42) (36)

    A = 11,448
  2. 20 September, 15:04
    0
    Your answer is S = 11448 ft 2
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