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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
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Nov 21, 2018
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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
Mathematics
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Patryk Kubiak
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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
Woohoojin
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Nov 25, 2018
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