SOLUTION: On a class trip to a very tall building, the class rode up several floors then rode down 20 floors, rode up 68 floors, rode up 68 floor, rode down 87 floors and ended up on the fir

Question 929845: On a class trip to a very tall building, the class rode up several floors then rode down 20 floors, rode up 68 floors, rode up 68 floor, rode down 87 floors and ended up on the first floor. How many floors does the building has, if the class actually reach the top floor?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
On a class trip to a very tall building, the class rode up several floors then rode down 20 floors, rode up 68 floors, rode down 87 floors and ended up on the first floor. How many floors does the building has, if the class actually reach the top floor?
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up:: x floors
down 20 to :: x-20
up 68 to :: x-20+68 = x + 48
down 87 to:: x+48-87 = x-43
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Equation:
x-43 = 1
x = 44
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Ans:: Highest point was x+48 = 44+48 = 92
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Cheers,
Stan H.
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