Question

Write the lateral surface area of a cuboid having length $l$ units, breadth $b$ units and height $h$ units.

• A. $2(l+b)h$
• B. $2(l+h)b$
• C. $3(l+b)h$
• D. $2(h+b)l$

Answer 1

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

To find the lateral surface area of the cuboid, we need to add the area of each lateral side.

Two sides will have the dimensions $b$ and $h$.

Other two sides will have the dimensions, $l$ and $h$.
Each wall is in the shape of a rectangle.
Hence, Lateral surface area of the cuboid $=2(b\times h)+2(l\times h)=2(l+b)h$