Question 900787
A cube has 4 equal sides.
Let x to be one side of the cube.
Since a cube has 4 equal sides, so {{{4x=20cm}}}.
{{{4x=20cm}}}
{{{x=20/4}}}
{{{x=5cm}}}

Area of cube = length x width
Area of cube = 5 x 5
Area of cube = {{{25 cm^2}}}