SOLUTION: It takes Maria 1 & 1/2 hours to deliver newspapers every morning. Hal can deliver the papers alone in one hour. How fast can they deliver the newspapers if they work together?

Question 456091: It takes Maria 1 & 1/2 hours to deliver newspapers every morning. Hal can deliver the papers alone in one hour. How fast can they deliver the newspapers if they work together?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
It takes Maria 1 & 1/2 hours to deliver newspapers every morning. Hal can deliver the papers alone in one hour. How fast can they deliver the newspapers if they work together?
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Maria DATA:
time = 3/2 hr/job ; rate = 2/3 job/hr
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Hal DATA:
time = 1 hr/job ; rate = 1 job/hr
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Together DATA:
time = x hr/job ; rate = 1/x job/hr
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Equation:
rate + rate = together rate
2/3 + 1 = 1/x
5/3 = 1/x
x = 3/5 hr
x = 36 minutes to do the job together
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Cheers,
Stan H.
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