Judi leans a 25\:m ladder against a vertical wall with the bottom of the ladder 7\:m from the wall. (Please note that Judi is very strong – don’t try this at home!) As she pulls the bottom of the ladder away from the wall, the top of the ladder slides 4\:m down the wall. How far did she pull the bottom of the ladder from its original position?
Answer Choices
A. 4\:m
B. 11\:m
C. 2\:m
D. 13\:m
E. 8\:m