A ladder is placed in such a way that its foot is at a distance of 15 m from a wall and its top reaches a window 20m above the ground. Find the length of the ladder.
We have to find the hypotenuse
p = 20m and base =15 m
h2=b2+p2
h2=202+152
h2=400+225
h=√625
h=25
the length of the ladder is 25m