Question

Two cubes each of 8 cm edge are joined end to end. Find the surface area of the resulting cuboid.​
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Answer 1

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$length \: of \: cuboid = 8cm$

$breadth \: of \: cuboid = 8 + 8 = 16cm$

$height \: of \: cuboid = 8$

$tsa \: of \: cuboid = 2(lb + bh + hl)$

$= 2(8 \times 16 + 16 \times 8 + 8 \times 8)$

$= 2(320)$

$= 640cm ^{2}$

 

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