Find the length of the longest pole that can be placed in a room 12 m long 8m broad and 9m high.  Select.
A) 22m  B) 77m  C) 88m  D) 17m  E) 16m
Explanation:   Length of longest pole = Length of the diagonal of the room   \inline {\color{Black}\sqrt{12^2+8^2+9^2}=\sqrt{289}=17m}   Answer: 17m
<result>D</result>
Find the length of the longest pole that can be placed in a room 12 m long 8m broad and 9m high.