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) (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
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