SOLUTION: Rob can deliver papers 4 times as fast as his younger brother. If they work together, it takes them 2 hours. How long would it take each to deliver the papers alone?

Question 518777: Rob can deliver papers 4 times as fast as his younger brother. If they work together, it takes them 2 hours. How long would it take each to deliver the papers alone?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Call delivering the papers 1 job
Let = Rob's time to deliver the papers in hours
= younger brother's time
Add their rates to get rate working together

Multiply both sides by

Rob's time working alone is 2.5 hrs
Brother's time working alone is 10 hrs
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