faithforlife4566 faithforlife4566

23-02-2018
Mathematics

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A jewl case that holds 2 cds is 140mm x 120 mm x 9 mm what is the surface area of this jewl

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Аноним Аноним

23-02-2018

The case will have 6 surfaces

Top + Bottom Surface = 2 x 140 x 120 = 33600 square mm
Right + Left Surface = 2 x 140 x 9 = 2520 square mm
Front and Back Surface = 2 x 120 x 9 = 2160 square mm
Total = 33600 + 2520 + 2160 = 38280 square mm

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