SOLUTION: Cindy and Mary owns a landscaping company. Cindy can complete a certain garden planting in 3 hours, while mary takes 4 hours to complete the same job. If both of them work together
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Question 922365: Cindy and Mary owns a landscaping company. Cindy can complete a certain garden planting in 3 hours, while mary takes 4 hours to complete the same job. If both of them work together, how long will it take to plant the garden? Found 2 solutions by ewatrrr, stanbon:Answer by ewatrrr(24785) (Show Source):
You can put this solution on YOUR website! Cindy and Mary owns a landscaping company. Cindy can complete a certain garden planting in 3 hours, while mary takes 4 hours to complete the same job. If both of them work together, how long will it take to plant the garden?
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Cindy rate:: 1/3 job/hr
Mary rate:: 1/4 job/hr
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Together rate:: 1/x job/hr
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Equation:
rate + rate = together rate
1/3 + 1/4 = 1/x
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4x + 3x = 12
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7x = 12
x = 12/7 hrs (time to do the job together)
Cheers,
Stan H.
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