MHB Calculate Dist from Dog to Column When Rope Breaks

[leprofece]

a rope of 1.20 m length has at one end a tie slide and in another a collar that attaches to a dog. The rope is passed through the sliding laze and around a square column of 24 cm from side to keep the tied-up dog while his master departs; but the dog pulls rope, and manages to break it by the collar. Calculate the distance from the dog to the face of the column when the rope breaks.
answer 27,2 cmI have no idea how I can solve it

 

[Evgeny.Makarov]

Please draw a diagram. I am not sure what a "sliding laze" and a "square column of 24 cm from side" are.