How do we calculate the surface area of a cube if we know the volume is 343?

Given that the volume of the cube is
343

Let x be the length of the side of the
cube.

Then we know that V = x^3 =
343

==> x = 7

Now let
us calculate the surface are.

The surface area of the cube
= area of one surface * 6

==> The area of one of the
surface = x^2 = 7^2 = 49

==> Then the surface area =
49* 6 = 294.

Then, the surface area of the
cube is 294 square units.