Question

The diagonal of cube is √12cm .what is hength of its edge.

Answer 1

diagonal of  cube is √12 = 2√3

as we know 

$diagonal of cube = a\sqrt{3}$
where a is edge of cube 

then

$2 \sqrt{3} = a \sqrt{3}   then a = 2$

thus length (edge) of cube is 2 units