SOLUTION: Kathrin and Tom together clean the garage in 3 hours. Seperatly, it takes Tom one hour more then Kathrin. How long does it take them to clean the garage seperatly? Approximate to t

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Question 195187: Kathrin and Tom together clean the garage in 3 hours. Seperatly, it takes Tom one hour more then Kathrin. How long does it take them to clean the garage seperatly? Approximate to the nearest tenth of an hour.
Answer by solver91311(24713) About Me  (Show Source):
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Here's how to do these 'working together' problems in general. Just plug in your numbers and do the arithmetic. Since your problem gives the rate for one person in terms of the rate for the other person, you should consider one person 's time alone to be x and the other x + 1.

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.


John