Question

A 5m long ladder reached a window 4m high from the ground on placing it against a wall at a
distance “a” m. Find the distance of the foot of the ladder from the wall.

Answer 1

Answer:

3

Step-by-step explanation:

let side or distance of foot of ladder from the wall be a.

pls refer img

by PGT

5²=4²+a²

a²=5²-4²

a²=(5-4)(5+4)

a²=1(9)

a²=9

a=+3 or -3

rejecting a=-3

Therefore, distance of foot of ladder from the wall is 3 m.