Question

A 15m long ladder reached a window 12m high from th ground on placing it against the wall find the distance of the foot of the ladder from the wall .

Answer 1

Answer:

9

Step-by-step explanation:

H = 15m P = 12m B =?

Accd.to Pythagoras theorem

H^2 =P^2 +B^2

15^2 =12^2 +B^2

225=144+B^2

225-144=B^2

81=B^2

B = 9

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Answer 2

Step-by-step explanation:

Pythagorean Therom ⇒ Base² + Height² = Hypotenuse²

⇒ 12² + Height² = 15²

⇒ 144 + Height² = 225

⇒ Height² = 225 - 144

⇒ Height² = 81

⇒ Height = √81

⇒ Height = 9m

∴The distance of the foot of the ladder from the wall is 9m