Question

Your friend has locked themselves out of the house, and they need your help to get back in. they have a 10 foot long ladder, and there is an open window height feet above the ground. How far from the wall of should you hold the ladder while they climb back in?

A. w = 2 feet
B. w = 12.8 feet
C. w = 9.6 feet
D. w = 6 feet

Answer 1

6 feet

D

Explanation:

Givens

l = 10

h = 8

w = ?

Formula

l^2 = h^2 + w^2

Solution

10^2 = 8^2 + w^2

100 = 64 + w^2

100 - 64 = 64 - 64 + w^2

w^2 = 36

sqrt(w^2) = sqrt(36)

w = 6 feet.