Question

A 15m long ladder reaches a window 12m high from the ground on placing it

against a wall. How far is the foot of the ladder from the wall?​

Answer 1

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Ho gye 20 character XD

Answer 2

Answer:

9cm

Step-by-step explanation:

Let AC be the ladder and A be the window.

Given: AC=15m, AB=12m, CB=am

In right angled triangle ACB,

(Hypotenuse) ²=(Base)² +[Perpendicular) ² [By Pythagoras theorem]

⇒(AC) ²=(CB) ²+(AB) ²⇒(15)² =(a) ²+(12) ²

⇒225=a ²+144

⇒a ²=225−144=81

⇒a= 81 =9cm

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