SOLUTION: Maria can shovel snow from her driveway in 60 minutes. Jim can do the same job in 55 minutes. How long would it take maria and jim to shovel the driveway if they worked together?
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-> SOLUTION: Maria can shovel snow from her driveway in 60 minutes. Jim can do the same job in 55 minutes. How long would it take maria and jim to shovel the driveway if they worked together?
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Question 329158: Maria can shovel snow from her driveway in 60 minutes. Jim can do the same job in 55 minutes. How long would it take maria and jim to shovel the driveway if they worked together?
Thank you Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website! M does 1/60 of the job per minute.
J does 1/55 per minute.
Together, they do 1/60 + 1/55 per minute
= 60/3300 + 55/3300
= 115/3300 per minute
--> 3300/115 minutes per job
= 660/23 minutes
=~ 28.7 minutes
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Use the shortcut, product/sum
60*55/(60 + 55)
= same answer
