a cube has a surface area of 30 square inches. find the length of one edge of the cube
2007-04-21 16:13:31 · 6 answers · asked by f00tballs_mvp 1 in Science & Mathematics ➔ Mathematics
the answer is x^1/n
x and n being numbers
2007-04-21 16:15:23 · update #1
If a cube measures x inches on each of its edges, then the area of one face is x^2. There are six faces on a cube, so the total surface area is 6x^2. So set this equal to 30 and solve for x:
6x^2 = 30
x^2 = 5
x = √5
2007-04-21 16:19:18 · answer #1 · answered by Anonymous · 0⤊ 0⤋
A cube has six sides. If the total surface area is 30 then the surface area of one side would be 30/6 = 5 sq. in.
Since each side is a square you know that if s = the length of each side, s^2 = 5, s = sqrt(5).
2007-04-21 23:20:09 · answer #2 · answered by Edgard L 2 · 0⤊ 0⤋
this is very easy.
a cube has six size, so each size's area is 30/6 =5
the length of one edge of the cube woudl then be 5^1/2
2007-04-21 23:21:24 · answer #3 · answered by dcw13 3 · 0⤊ 0⤋
the length of any side is the square root of 5.
30 divided by six (sides) = 5 inches squared for each side
2007-04-21 23:19:01 · answer #4 · answered by Matt C 1 · 0⤊ 0⤋
6s^2=30
s^2=5
s=sqrt(5) inches =length of one edge of cube.
The answer you gave is wrong.
2007-04-21 23:21:46 · answer #5 · answered by ironduke8159 7 · 0⤊ 0⤋
its 2.5inches.
2007-04-21 23:19:47 · answer #6 · answered by Glowing 1 · 0⤊ 1⤋