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One person can do a certain job in twenty-one minutes, and another person can do the same job in twenty-eight minutes. How many minutes will it take them to do the job together?…

One person can do a certain job in twenty-one minutes, and another person can do the same job in twenty-eight minutes. How many minutes will it take them to do the job together?…
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One person can do a certain job in twenty-one minutes, and another person can do the same job in twenty-eight minutes. How many minutes will it take them to do the job together?

User Fernando Petrelli
by
7.7k points

2 Answers

5 votes
49 minutes because you have to add twenty one and twenty eight together to get the whole.
User Lanpa
by
8.0k points
5 votes

Answer: 12 minutes

Explanation:

User Pancho
by
8.3k points
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