This is practice for the SAT
Q) If the area of a cube is 49 square inches, what is the total length, in inches, of all edges of the cube?
A) 84 in.
2007-10-07 13:40:51 · 3 answers · asked by dude 1 in Science & Mathematics ➔ Mathematics
If the area refers to one face of a cube, which is a square, the edge length must be 7 inches (7x7=49). A cube has 4 top edges, 4 bottom edges, and 4 vertical edges. So 12 x 7 = 84 inches.
Sorry, Michelle, but you CAN have an area for a cube in square inches - it would be six times the area of one face. The area of this cube is 49x6 = 294 square inches.
2007-10-07 13:49:11 · answer #1 · answered by TitoBob 7 · 0⤊ 0⤋
Impossible. You can't use square inches for the area of a CUBE (cubed).
Ignoring that, you "unsquare" 49, which equals 7. A cube has 12 edges, so multiply 7 by 12, which is 84 inches.
It should have said the area of a plane of a cube is 49in2.
2007-10-07 20:47:43 · answer #2 · answered by Michelle Z 3 · 0⤊ 0⤋
area of each side =49 / 6 =8.1666 in ^2
length of each side = root 8.1666 =2.8577 in
total of all edges = 12 x 2.8577 =34.2924 in .
2007-10-07 20:52:26 · answer #3 · answered by Anonymous · 0⤊ 0⤋