Find the length of the largest rod which can be placed in a room of dimensions 12 m, 16 m, 20 m?
Answer & explanation
Correct answer: option 3
Length of largest rod = diagonal of cuboid
= \(\sqrt {(l)² + (b)² + (h)² }\)
= \(\sqrt {(12)² + (16)² + (20)² }\)
= \(\sqrt {144 + 256 + 400}\) = \(\sqrt {800}\) = 20\(\sqrt{2 }\) cm