Question

Find the length of the side of a cube whose total surface area is $1536c{m}^2$.

• A. $16cm$
• B. $18cm$
• C. $6cm$
• D. $1cm$

Answer 1

The correct option is A $16cm$

The total surface area of a cube is equal to $6a^2$, where $a$ is the side of the cube.

So, $6a^2=1536$

$a^2=256$

$a=\pm 16$

Since length can't be negative, $a=16cm$