The surface area of one of the two cubes is 486 cm2, and the surface area of the other is 294 cm2.

The surface area of one of the two cubes is 486 cm2, and the surface area of the other is 294 cm2. How many centimeters is the edge of the first cube larger than the edge of the second cube?

1) Calculate the area of the face of the first cube:

486/6 = 81 cm ^ 2;

2) The length of the edge of the first cube is:

√81 = 9 cm;

3) Calculate the area of the face of the second cube:

294/6 = 49 cm ^ 2;

4) The length of the edge of the second cube is:

√49 = 7 cm;

5) Calculate how much the edge of the first cube is longer than the edge of the second cube:

9 – 7 = 2 cm;

Answer: The edge of the first cube is 2 cm longer than the edge of the second cube.