What is the length of the longest pole which can be kept in a room 12 m long, 4 m broad and 3 m high?	Options:
A) 22  B) 17  C) 66  D) 13  E) 57
d2 = 122 + 42 + 32 = 13   Answer: 13
<result>D</result>
What is the length of the longest pole which can be kept in a room 12 m long, 4 m broad and 3 m high?