The formula for lateral surface area of a solid is

2 h (l + b)

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2 l (h + b)

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2 b (l + h)

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2 (l b + b h + h l)

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Solution

The correct option is A $2 h (l + b)$
In a cuboid, let length $= L$ , breadth $= B$ and height $= H$ .
Lateral surface area of a cuboid $=$ Sum of area of its vertical surfaces.
$=$ Area (front / back surfaces) $+$ Area ( $2$ side faces)
$= 2 H L + 2 H B$
$= 2 H (L + B)$
So, option A is correct.

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The formula for lateral surface area of a solid is

The correct option is A 2h(l+b)In a cuboid, let length =L, breadth =B and height =H.Lateral surface area of a cuboid = Sum of area of its vertical surfaces.= Area (front / back surfaces) + Area ( 2 side faces)=2HL+2HB=2H(L+B)So, option A is correct.

The correct option is A $2 h (l + b)$
In a cuboid, let length $= L$ , breadth $= B$ and height $= H$ .
Lateral surface area of a cuboid $=$ Sum of area of its vertical surfaces.
$=$ Area (front / back surfaces) $+$ Area ( $2$ side faces)
$= 2 H L + 2 H B$
$= 2 H (L + B)$
So, option A is correct.