if the length of the sides of two cubes are in the ratio 5 : 1 , what is the ratio of their total surface area ?
"let x be the length of the small cube ' s side . the total surface area of the small cube is 6 x ^ 2 . the total surface area of the large cube is 6 ( 5 x ) ^ 2 = 150 x ^ 2 . the ratio of surface areas is 25 : 1 . the answer is c ."
multiply(5, 5)