Question

a leader is placed against a wall in such a way that it's foot is at distance of 9m from the wall and it's top reaches a window 12m above the ground in the wall find the length of the leader. ​

Answer 1

$<marquee behavior =move bgcolor =pink><h1> hello sista❤️</h1 ></marquee >$

$<b><i><u>$height of the wall ==> 12m

Distance from the ladder to the wall =9m

(12)^2 + (9)^2==> (x)^2

144 + 81 ==>(x)^2

225==>x^2

15=x

Height of ladder = 15 m