A firefighter places a 29 feet ladder, so that the base of the ladder is 21 feet from the wall. What is the height at which the top of the ladder touches the wall?

Question

Mathematics

Kenley Hahn

28 May, 21:19

A firefighter places a 29 feet ladder, so that the base of the ladder is 21 feet from the wall. What is the height at which the top of the ladder touches the wall?

+2

Answers (1)

Know the Answer?

Forbes · Answer 1

Pythagorean theorem:

a^2+b^2=c^2 (C^2 always is the hypotenuse)

21^2+b^2=29^2

441+b^2=841

841-441=400

square root of 400 is 20

Your answer is 20