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2 votes
A cube has a surface area of 100 square inches. Which choice is closest to the length of an edge of the cube?

2 Answers

2 votes
Simple.....

you have: Surface Area of a cube is 100
in^(2)

We know that the formula for Surface Area is SA=6
a^(2)

1.)

SA=6
(1.7) ^(2)

SA=17.34

2.)

SA=6
(3.3) ^(2)

SA=65.34

3.)

SA=6
(4.1) ^(2)

SA=100.86 (Answer)

4.)

SA=6
(10) ^(2)

SA=600

Thus, your answer.
User Lars Viklund
by
8.1k points
2 votes
surface area is the area of a face and add all faces areas up cubes have square faces
since it is a cube the areas of the face are the same and there are 6 faces so 100/6= 16.67
the area of a square is l times w and l and w are same since it is a square do the square root of 16.67 and the only answer that has the square root of 16 is 4.1
User Fequish
by
8.1k points

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