Question

Two cubes, each with 8 cm edge are joined end to end. Find the surface area of resulting cuboid

Answer 1

total surface area of cuboid
=surface area of two cubes-area of two sides
=
$2 \times 6 \times {8}^{2} - 2( {8)}^{2} \\ = 768 - 128 \\ = 640$

Answer 2

Answer:

640 cm²

Step-by-step explanation:

New length = 16

breadth = 8

height = 8

Surface area = 2 (lb + bh + lh)

                      = 2 (128 + 64 + 128)

                      = 2 * 320

                      = 640 cm²

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