SOLUTION: It takes Amy twice as long to clean the office as it does Nancy. How long would it take each girl to clean the office by herself if they can clean the office together in 40 minute
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Question 277932: It takes Amy twice as long to clean the office as it does Nancy. How long would it take each girl to clean the office by herself if they can clean the office together in 40 minutes? Answer by richwmiller(17219) (Show Source):
You can put this solution on YOUR website! It takes Amy twice as long to clean the office as it does Nancy. How long would it take each girl to clean the office by herself if they can clean the office together in 40 minutes?
a=2n
40/n+40/2n=1
80+40=2n
120=2n
n=60 min
a=120 min.
check
40/60+40/120=1
2/3+1/3=1
x/60+x/120=1
2x+x=120
3x=120
x=40
ok
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