Question

The total surface area of a cube is 54 cm square.What is the length of its sides?

Answer 1

TSA of cube = 6 * side^2
54cm^2 = 6 * side ^2
54cm^2/6 = side^2
9 cm^2 = side^2
(3)^2 = side^2
3cm = side


So length of side is 3cm

Answer 2

$tsa \: of \: cube \: = 6a ^{2}$
54=6a²
a²=9
a=3cm
each side measures 3cm