A ladder is leaning against a wall which is 21m high. If the length of the ladder is 29m, find at what distance the bottom of the ladder has kept from the base of the wall.
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A ladder is leaning against a wall which is 21m high. If the length of the ladder is 29m, find at what distance the bottom of the ladder has kept from the base of the wall.
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Answer:
20 m
Step-by-step explanation:
Use pythagoras theorem
hypotenuse = ladder = 29 m
height = wall = 21 m
base ?
hyp² = base² + ht²
base² = hyp² - ht²
base² = (29 m)² - (21 m)²
base² = 841 m² - 441 m²
base² = 400 m²
base = 400 m²½...(sqaure root)
base = 20 m
Distance between ladder and wall is 20 .
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