The formula sa SA 6 gives the length of the side, s, of a cube with a surface area, SA. How much longer is the side of a cube with a surface area of 180 square meters than a cub…

Question

asked Jan 28, 2022 225k views

1 Answer

Wim Hermans · Answer 1 · 2022-02-03T02:56:05+0000

Answer:

The correct option is (b).

Explanation:

The formula for the side of a cube of surface area SA is as follows :

$s=\sqrt{(SA)/(6)}$

When SA = 180 m²

$s=\sqrt{(180)/(6)}\\\\s=√(30)$

When SA = 120 m²

$s=\sqrt{(120)/(6)}\\\\s=√(20)\\\\=2\sqrt5$

Difference,

$=30-2\sqrt5$

So, the correct option is (b).