Assuming that the wall makes a right angle with the floor, then we have right triangle: wall, floor, ladder.
cos(68)=x/l, where x is the distance between the base of the ladder and wall, and l=8m is the length of the ladder.
Thus:
x=l×cos(68)=8×cos(68)=2.99m= aprox 3m
Answer: aprox 3m
