If the length of the diagonal of a cube is $7\sqrt{3}$ cm, then the surface area of circle is ________.
Answer & explanation
Correct answer: option 4
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.