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KATRIN_1 [288]
2 years ago
10

Alyssa can complete a job in 12 minutes. If Miranda helps her, they can complete the job in 9 minutes. How long would it take Mi

randa to complete the job by herself? (In minutes.) Rate of work problem
Mathematics
1 answer:
miv72 [106K]2 years ago
4 0

Answer:

36 minutes

Step-by-step explanation:

The key is to get the same amount of time for each.

9 * 12 = 108

At 12 minutes per job,

in 108 minutes Alyssa could do

108/12 = 9 jobs

At 9 minutes per job,

Together in 108 minutes they could do

108/9 = 12 jobs

--------------------------

In 108 minutes Mirada does

12 - 9 = 3 jobs

108/3 = 36 minutes per job

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