SOLUTION: Please help me solve this equation: Faith and Charity are sister who share a room. Faith takes 45 mins to clean their room alone, while Charity takes an hour. How long would it tak

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Question 452083: Please help me solve this equation: Faith and Charity are sister who share a room. Faith takes 45 mins to clean their room alone, while Charity takes an hour. How long would it take them to clean their room together?
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


If A can do a job in x time periods, then A can do of the job in 1 time period. Likewise, if B can do the same job in y time periods, then B can do of the job in 1 time period.

So, working together, they can do



of the job in 1 time period.

Therefore, they can do the whole job in:



time periods.

Hint: 45 minutes is 3/4 hour.


John