SOLUTION: Maria and Charlie deliver 75 papers in 3 hours. How long does it take to deliver 60 papers?

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Question 1171421: Maria and Charlie deliver 75 papers in 3 hours. How long does it take to deliver 60 papers?
Found 2 solutions by ikleyn, greenestamps:
Answer by ikleyn(52818)   (Show Source): You can put this solution on YOUR website!
.

Use the proportion


     = .


From the proportion,


    x =  =  =  = 2  hours = 2 hours and 24 minutes.    ANSWER

Solved.



Answer by greenestamps(13203)   (Show Source): You can put this solution on YOUR website!


The solution method shown by tutor @ikleyn is a perfectly good one.

Here is another that some students may like better.

(Multiply the given time by the ratio of the numbers of newspapers in the two cases....)



ANSWER: 12/5 hours, or 2 2/5 hours, or 2 hours 24 minutes

In common sense ordinary language, 4/5 as many newspapers to deliver means 4/5 as much time is required.
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