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13 December, 11:58

3 cubes each of volume 27cm^3 are joined end to end. Find the surface area of resulting cuboid

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Answers (2)
  1. 13 December, 13:47
    0
    Answer: 126 cm^2

    Step-by-step explanation:

    side of cube is cube root of volume, so that s * s * s = v, s = (v) ^ (1/3)

    v = 27 cm^3, s = 3 cm.

    Cuboid (a/k/a rectangular prism) has sides 3s, s, s, two faces area s * s, four faces area 3s * s, total area 2*s^2 + 4*3*s^2 = 14*s^2 = 14*9 cm^2 = 126 cm^2
  2. 13 December, 14:25
    0
    The surface area of the 3 cuboids joined together are 126 cm^2
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