Question

If the lateral surface area of a cube is y $c{m}^2$ and its side is 20 cm then the value of y is

• A. $800$
• B. $1000$
• C. $1200$
• D. $1600$

Answer 1

The correct option is D $1600$

Lateral surface area of the cube$=4a^2$

Here $a=20cm$

$\therefore$Lateral surface area of the cube $=4\times (20{)}^2$

$\Rightarrow 4\times 400=1600c{m}^2$