Find the length of the longest rod that can be placed in a room 12 m long, 9 m broad and 8 m high.
Given,
Length of room = 12 m
Breadth = 9m
Height = 8m
So,
Length of longest rod that can be placed in room = diagonal of room (cuboid) = 
1
Find the length of the longest rod that can be placed in a room 12 m long, 9 m broad and 8 m high.
Given,
Length of room = 12 m
Breadth = 9m
Height = 8m
So,
Length of longest rod that can be placed in room = diagonal of room (cuboid) =