Question

A 15 metre long ladder reads window 12 metre height from the ground on placing it against the wall at a distance a find the distance of the foot of the ladder from the wall

Answer 1

Answer:

15*15-12*12=81                     [pythagoras]

dist=9m

Answer 2

Answer:

9m

Step-by-step explanation:

by pythagoras theorem :

$15^{2}$ = $12^{2}$ + $x^{2}$

225 = 144 + $x^{2}$

$x^{2}$= 225 - 144

$x^{2}$ = 81

x = $\sqrt{81\\}$

  =9m