Question

if the side of a cube is 3m find the longest diagonal​

Answer 1

Answer:

diagonal of a cube

$= \sqrt{3} a$

diagonal of this cube is 3√3 m

Answer 2

Answer:

3^2 +3^2=18 then diagonal of one surface come sq. root 18 and in cube we match one corner of upward by opposite corner of downward surface again use phythagorus theorem then

sq. root 18 ^2 + 3^2 =diagonal square

18 +9 =diagonal square

diagonal = sq. root 27 or 3×sq. root 3