Posted by kim on Thursday, November 1, 2007 at 10:20pm.
Can someone help me with this word problem.
How far up a wall will an 11m ladder reach, if the foot of the ladder must be 4m from the base of the wall? Round your answer to the nearest tenth.

algebra.math  Reiny, Thursday, November 1, 2007 at 11:47pm
The ladder will form a rightangled triangle with the wall, so use Pythagoras
x^2 + 4^2 = 11^2
etc