What is the ratio Q of the surface area of a cube to the surface area of a rectangular solid identical to the cube in all ways except that its length has been doubled? Choose the correct choice from the following options:  A) 1/4  B) 3/8  C) 1/2  D) 3/5  E) 2
Let X be the side of the cube. Therefore X^2*6= surface area.   the rectangle is the same other than length is 2X. The width and height are the same as the cube. 2*W*H+2*W*L+2*H*L= 2X^2+4X^2+4X^2= 10X^2.   6X^2/10X^2 = 3/5.= Q   Answer = 3/5
<result>D</result>
What is the ratio Q of the surface area of a cube to the surface area of a rectangular solid identical to the cube in all ways except that its length has been doubled?