Question

A 10 ft. ladder leans against a wall so the base of the ladder is 4 ft. from the wall. how high up on the wall will the ladder reach?

A. 9.17
B. 84
C. 10.4

Answer 1

Using Pythagoras theorem:-

10^2 = 4^2 + h^2

h^2 = 100 - 16 = 84

h = sqrt 84 = 9.17 ft answer