how do u solve this?

Question

The base of a 10-foot ladder is placed 3 feet away from the wall of a building. How high does the ladder go up the wall?

Answer 1

L = length of ladder = 10 ft

x = 3 ft

y = height = ?

 

x² + y² = L² ⇒

 

y = √(L² - x²) = √(10² - 3²) ft = √91 ft ≅ 9.54 ft