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Three cubes are adjacent to each other(forms a cuboid).

ratio b/w total surface area of cuboid to the 3 cube's tsa=?(i call total surface area-tsa)


3 cubes surface area is 6 x^{2} +6 x^{2} + 6x^{2} = 18 x^{2}

and surface area of cuboid with side lenghts x and 3x is 14 x^{2}

where x is side lengths of the cube

SO their ratio is 14:18  i.e. 7:9
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