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Question

Three cubes of each side 4 cm are joined end to end. Find the surface area of the resulting cuboid.

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Solution

By joining three cubes of side 4 cm each, end to end, we get a cuboid.

Length of cuboid = 4×3=12 cm

Breadth = 4 cm

and height = 4 cm

Surface area = 2(lb+bh+hl)

=2[12×4+4×4+4×12] cm2

=2[48+16+48] cm2

=2×112=224 cm2


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