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$2 (lb + bh + hl),$ where the length, breadth and height are $l, b$ and $h$ respectively, is the formula for

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Total surface area of a cuboid

Area of a cube

Volume of a cuboid

None of these

answer is A.

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Detailed Solution

Here, we have to find the term which is represented by the expression

2 (lb + bh + hl),

where the length, breadth and height are

l, b

and

h

respectively.
Question Image

A cuboid's total surface area (TSA) is the sum of the areas of its six rectangular sides.
So, the TSA of cuboid

= l \times b + b \times h + h \times l + l \times b + b \times h + h \times l

\Rightarrow TSA = 2 (lb + bh + hl)

Therefore,

2 (lb + bh + hl)

is the formula for the total surface area of a cuboid.
Hence option (1) is correct.

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