For Problems 23-25, set up an equation and then solve the problem.
It takes Jodi three times as long to deliver papers as it does Jannie. Together they can deliver the papers in 15 minutes. How long would it take Jodi by herself?
The time taken by Jodi.
The rate of work in uniform-work rate problems can be express as.
Here, rate of work is , work done quantity is and time taken to do the quantity work is .
Consider time required to deliver the papers by Jannie is then time required by Jodi becomes and quantity of work is one unit.
The sum of rates for each should be equal to the rate of deliver the papers when they work together.
Multiply LCD which is on both sides
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