Question

Find the lateral surface area of a cubical lamp of edge 10 cm.

• A. 40 $c{m}^2$
• B. 200 $c{m}^2$
• C. 400 $c{m}^2$
• D. 440 $c{m}^2$

Answer 1

The correct option is C 400 $c{m}^2$

Given, the edge of the cubical lamp is 10 cm.
We know, lateral surface area of a cube of edge 'a' is $4a^2$.
Therefore, lateral surface area of the given cubical lamp
$=4\times {10}^2=400{\text{cm}}^2$