Question

Two poles,A and B, are 12 meters apart. Pole A is 5 meters high. A rope 20 meters long is tied to the top of pole A and stretches to the top of pole B. What is the height of pole B? Assume that pole B is taller than pole A

Answer 1

We will use the Pythagorean theorem:
c² = a² + b²
b² = c² - a²
x² = 20² - 12²
x² = 400 - 144
x² = 256
x = √256
x = 16
The pole B : 16 m + 5 m = 21 m
Answer: C ) 21 m