find the length of the longest pole that can be placed in a room 12 m long , 8 m broad and 9 m high .
solution length of longest pole = length of the diagonal of the room = √ ( 12 ) 2 + 82 + 92 ‹ = › √ 289 = 17 m . answer c
sqrt(add(power(9, const_2), add(power(12, const_2), power(8, const_2))))