Question

A ladder 10 m long rests against a vertical wall .If the foot of the ladder is 6 metre away from the wall and the ladder just reaches the top of the wall. How high is the wall?* 2 points 6m 8m 10m 12m​

Answer 1

Answer:

Let WA=10m be the length of the ladder and WL=xcm be the height of the wall . As wall WL=xm is vertically up so by Pythagoras theorem.

In angle angled triangle WLA

WL

2

+AL

2

=WA

2

x

2

+6

2

=10

2

x

2

=10

2

−6

2

=100−36

⇒x

2

=64

⇒x=8

Answer 2

$\huge\color{te}\colorbox{silver}{ANSWER}$

x=8.Is your answer.