SOLUTION: If i can do a job in 4h and we can do the same job in 2h, how long can you do the job alone?

SOLUTION: If i can do a job in 4h and we can do the same job in 2h, how long can you do the job alone?

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Question 469840: If i can do a job in 4h and we can do the same job in 2h, how long can you do the job alone?
Answer by sofiyac(983) (Show Source): You can put this solution on YOUR website!

cross multiply

divide each side by 2
so if we do it alone we can both get it done in 4 hours each, but if we do it together we get it done in 2 hours. So you can do it alone in 4.
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