Question

A ladder 13m long rests against a vertical wall. If the foot of the ladder is 5m from the foot of the wall, find the distance of the other end of the ladder from the ground. ​

Answer 1

Answer:

This we can find with the hypotenuse

So

(13)² - (5)²

169-25

144

then

144 is in underroot

then the answer is 12

Answer 2

Look if you draw the figure it will form right angles triangle with hypotinuse 13, side as 5.
Then last side, i.e. , the distance will be root(13^2 -5^2) by pythagorus theoram
Answer will come 12