Respuesta :

ferrybukantoro

Step-by-step explanation:

by using the pythagoras theorem,

the height of the ladder touching the wall =

√(20²- 4²)

=√ (400-16)

=√384

= 8√6 feet

or 19.6 feet

Using Pythagorean theorem

[tex]\\ \rm\longmapsto P^2=H^2-B^2[/tex]

[tex]\\ \rm\longmapsto P^2=20^2-4^2[/tex]

[tex]\\ \rm\longmapsto P^2=400-16[/tex]

[tex]\\ \rm\longmapsto P^2=384[/tex]

[tex]\\ \rm\longmapsto P=\sqrt{84}[/tex]

[tex]\\ \rm\longmapsto P=19.6ft[/tex]

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