What is the maximum length of a rod that can be placed inside a cube-shaped room with each side measuring 4 meters?

Explanation

The longest rod that can fit inside a cubic room is the space diagonal of the cube. For a cube with side length 'a', the diagonal length is given by a√3. Here, with a = 4 m, the diagonal is 4 × √3 ≈ 6.93 meters.