If the length of the diagonal of a cube is $7\sqrt{3}$ cm, then the surface area of circle is ________.

216 cm2 256 cm2 284 cm2 294 cm2

294 cm2

We know that, Diagonal of cube = \(\sqrt {3}\) × Side of cube Surface area of cube = 6(side)2 We have, The length of the diagonal of a cube is 7\(\sqrt {3}\) cm Diagonal of cube = \(\sqrt {3}\) × Side of cube = 7√3 = Side = 7 Now,  Surface area of cube = 6(Side)2 = 6(7)2 = 294 cm2.