SOLUTION: paul can mow the grass in 50 minutes, but it takes Dan three timese longer. how long will it take them to mow the grass if they worked together?

Question 479775: paul can mow the grass in 50 minutes, but it takes Dan three timese longer. how long will it take them to mow the grass if they worked together?
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
paul can mow the grass in 50 minutes, but it takes Dan three timese longer. how long will it take them to mow the grass if they worked together?
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Paul does 1/50 of the job per minute.
3 times longer is 150 minutes longer = 200 minutes
Dan does 1/200 per minute.
Together, they do 1/50 + 1/200 per minte = 1/40 per minute
--> 40 minutes

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