A ladder is placed in a hall resting against a wall reaching 7.5ft
above the ground. Keeping its foot at the same point, the ladder is turned to the opposite wall to reach 12 ft above the ground. Find the width of the hall, if the ladder is 12.5 feet long.
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Answer:
answer is 13.5ft
Step-by-step explanation:
use Pythagoras theorem both side and add 10ft and 3.5ft so you will get 13.5ft
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