A student walked out from the Classroom towards the library. He went first to the canteen on the left side, 24 ft. away. After a cup of tea, took a right turn and went to the Laboratory 13 ft. away. He then went to the Physics Block, 15 ft. to the left he talked to a friend, in the garden 3 ft. on the left and continued walking in the same direction to the Library, 10 ft. more. What was the actual distance between the Library and the Classroom?