Question

The total surface area of a cube is $5046m^2$. Find the edge length of the cube.
(2 marks)

Answer 1

Total surface area of a cube is given by $6a^2$

(where a is the edge length of the cube)

(0.5 marks)

Therefore, $5046m^2=6a^2$

$\Rightarrow a^2=841m^2$

$\Rightarrow a=29m$

(1.5 marks)