What is the total surface area of a cuboid ?

2 (l b + b h + h l)

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(l \times b \times h)

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(l \times b)

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None of these

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Solution

The correct option is A $2 (l b + b h + h l)$

Let the length, breadth and height of the cuboid be $l, b$ and $h$ respectively.

The total surface area of a cuboid (TSA) is equal to the sum of the areas of its 6 rectangular faces.

TSA of cuboid $= l \times b + b \times h + h \times l + l \times b + b \times h + h \times l$

$= 2 (l b + b h + h l)$

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