Question

If the total surface area of a cubical box is 54cm²,find the length of its edge

Answer 1

6a^2= 54

a=3cm

FOLLOW ME........

Answer 2

Answer: Since the surface area of a cube comprises six identical squares, the S.A. of a cube with edge length a is:

SA=6a2  

We know the SA is 54 cm 2  and we want to find a, so we plug in what we know and solve for what we need:

54=6a2⟹546=a2⟹9=a2  

⟹±3=a  

However, the length of the edge of a cube can’t be negative, so  a=3  cm.