179k views
5 votes
What is the length of each edge of a cube if its surface area is 486 square units?

User Dlannoye
by
7.7k points

1 Answer

3 votes
SA = 2LW + 2LH + 2WH

Since it is a cube, all of the dimensions, LWH, will be the same.

SA = 2s^2 + 2s^2 + 2s^2

SA = 6s^2486 = 6s^2

Divide both sides by 681 = s^2Take the square root of both sides. 9 = s

Hope this helped☺☺
User Walfrat
by
8.0k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.