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Dmitry_Shevchenko [17]
2 years ago
12

The latter is leaning against the building so that the distance from the ground to the top of the ladder is 9 feet less than the

length of the ladder finally put the ladder in the distance from the bottom of the ladder to the building 15 feet
Mathematics
1 answer:
Rama09 [41]2 years ago
3 0

Complete question :

The latter is leaning against the building so that the distance from the ground to the top of the ladder is 9 feet less than the length of the ladder finally put the ladder in the distance from the bottom of the ladder to the building 15 feet. Find length of the ladder.

Answer:

17

Step-by-step explanation:

From Pythagoras :

Hypotenus = sqrt(opposite² + adjacent²)

From the diagram

l = sqrt((l-9)² + 15²)

l² = (l² - 18x + 81 + 225)

Square both sides

l² = l² - 18x + 306

l² - l² = 306 - 18x

18l = 306

l = 306/18

l = 17

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