Question

A ladder is placed against a wall such that its foot is at a distance of 5m from the
wall and its top reaches a window 513 m above the ground find the length of the
ladder.​

Answer 1

Answer:

When a ladder is placed, it will form a right angle triangle ABC

AB represents wall and AC represents ladder.

Given : Distance of ladder from wall is BC=5 m

Height of window is AC=12 m

The wall makes an right angle at window with ladder

In right angle triangle ABC,

(AC)

2

=(AB)

2

+(BC)

2

⇒(AC)

2

=(12)

2

+(5)

2

=144+25=169

⇒AC=13 m