Question

a cubical room has a side if 4m find the longest rod that can be placed in that room

Answer 1

Answer:

$\sqrt{ {4}^{2} + {4}^{2} + {4}^{2} } = \sqrt{16 \times 3} = 4\sqrt{3} m$

This is the answer

Answer 2

here is the answer

only by using pythogoreous theorem