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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?…

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asked Feb 3, 2017 153k views

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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?

Mathematics
high-school

Fernando Petrelli asked

by Fernando Petrelli

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5 votes

49 minutes because you have to add twenty one and twenty eight together to get the whole.

Lanpa answered Feb 5, 2017

by Lanpa

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5 votes

Answer: 12 minutes

Explanation:

Pancho answered Feb 8, 2017

by Pancho

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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?…

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