Question

a ladder of length 25m touches the window on the wall at 20m height. Find the distance of the foot of ladder on the ground from the wall. ​

Answer 1

Answer:

Answer is 15m

Explanation:

Pythagorean theorem will be applied here

${a}^{2} + {b}^{2} = {c}^{2}$

${20}^{2} + {b}^{2} = {25}^{2} \\ 400 + {b}^{2} = 625 \\ {b }^{2} = 625 - 400 = 225 \\ b = 15m$