Question

The length of the longest pole that can be kept in a room $(12m\times 9m\times 8m)$ is

(a) 29 m (b) 21 m (c) 19 m (d) 17 m

Answer 1

Given length l = 12 m
breadth b = 9 m and height h = 8 m
Longest rod that can be placed in a room is nothing but its diagonal.
Length of diagonal of a cuboid =
Length of longest rod = m
= m
= m
= 17 m
Thus the length of the longest rod is 17 m
option d is correct