Question 545137: Joe needs 6 hours to file the day's paperwork. It take Charlotte 12 hours to do the same job. How long will it take if they work together?
Answer by saifoo.khan(162)   (Show Source):
You can put this solution on YOUR website! Hello,
1/6 + 1/12 = 1/x
Solve.
(2+1)/12 = 1/x
3/12 = 1/x
1/4 = 1/x
x = 4
So it will take both 4 hrs if they both are going to work.
THank you.
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