Question

A ladder, 8 m long, reaches a window 6m above the ground. How far from the wall is the bottom of the ladder? A:10m B:45‾‾‾√m #3 213‾‾‾√m #4 27‾√m

Answer 1

Answer:

Let the ladder be AB and window be BC. let the wall be AC

AC2 = BC2 +AB2

AC2 =(6)2 +(8)2

AC2 =36 +64

AC2 =100

AC =√100

AC =10cm

Answer 2

Answer:

2√7

Step-by-step explanation:

ab^2=ac^2+bc^2

=> bc^2= ab^2-ac^2

=> x^2=(8)^2-(6)^2

=> x^2=64-36=28

=> x^2=28

=> x=√28=√7*2*2=2√7