A ladder of 85 m length is resting against a wall. If it slips 7 m down the wall, then how far is the bottom from
the wall if it was initially 40 m away from it.
initially, the height h was
40^2+h^2 = 85^2
h = 75
Now, after sliding down, we have
x^2 + 68^2 = 85^2
x = 51