SOLUTION: At the pure water bottling company one machine can produce 180 bottles in 5 hours and a newer machine can produce 180 bottles in three hours. How long would it take the two machin

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Question 245401: At the pure water bottling company one machine can produce 180 bottles in 5 hours and a newer machine can produce 180 bottles in three hours. How long would it take the two machines working together to produce 720 bottles of water?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
At the pure water bottling company one machine can produce 180 bottles in 5 hours and a newer machine can produce 180 bottles in three hours. How long would it take the two machines working together to produce 720 bottles of water?
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rate of the 1st machine: 180/5 = 36 bottles per hour
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rate of the 2nd machine: 180/3 = 60 bottles per hour
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rate of both machines together: (36+60) = 96 bottles per hour
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Time to produce 720 bottles:
Let the time be "x" hrs.
x(96/hr) = 720
x = 720/96
x = 7.5 hrs.
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Cheers,
Stan H.