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Ladder

Math brain teasers require computations to solve.

 

Puzzle ID:#29344
Fun:*** (2.76)
Difficulty:** (1.87)
Category:Math
Submitted By:Crazycriely*
Corrected By:MarcM1098

 

 

 



Assume the ladder is NOT an extension ladder.
A 25 ft ladder is placed with its foot 7 ft away from a building. If the top of the ladder slips down 4 ft, how many feet will the bottom slide out?

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Answer

8 ft

First triangle: 7 squared + 24 squared = 25 squared, so the top of the ladder was 24 feet high.

24 - 4= 20. 25 squared - 20 squared = 225. Take the square root of that and you get 15: the new base of the triangle. 15 - 7 (the old base) = 8ft

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