Asked by magyc

Every week Linda must stuff 1000 envelopes. She can do the job by herself in 6hrs. If Laura helps, they get done in 5 1/2 hrs. How long would it take Laura to do the job herself?
Answered by drwls
Let Laura's time by herself be x.

The equation to solve is 1/6 + 1/x = 1/5.5 = 2/11

1/x = 2/11 -1/6 = 12/66 - 11/66 = 1/66

x = 66 hours (That's why Laura isn't much help)

Answered by javarrius
m(m - 3) < 54
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