The ratio of the volumes of two cubes is 64:343. Find the ratio of their corresponding diagonals.

1 answer

Let the side length of the first cube be x and the side length of the second cube be y.

The volume of the first cube is x^3 and the volume of the second cube is y^3.

Given that the ratio of their volumes is 64:343, we have:

x^3/y^3 = 64/343

Taking the cube root of both sides, we get:

x/y = 4/7

Now, we know that the volume of a cube is directly proportional to the cube of its side length and the length of the diagonal of a cube is √3 times the length of its side.

Therefore, the ratio of their corresponding diagonals will be:

x√3/y√3 = 4√3/7√3 = 4/7

So, the ratio of their corresponding diagonals is 4:7.