What is the length of the longest rod that can be placed in a room of dimensions 12 m 9 m 8 m?
Answer & explanation
Correct answer: option 2
The longest rod that can be placed inside the room = \(\sqrt {l^2 + b^2 + h^2}\)
= \(\sqrt {12^2 + 9^2 + 8^2}\)
= \(\sqrt {144 + 81 + 64}\) = \(\sqrt {289}\) = 17 m