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If two workers can do a task in 8 hours and a third worker can do the same task in 12 hours, then how long would it take the three workers together to complete the task?

 Oct 4, 2020
 #1
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9 adn 1/3 hours

i think

 Oct 4, 2020
 #2
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Since the question does not specify the individual work rate of the 2 men, we therefore, have to lump them together as one with a rate of 8 hours.

 

1 / 8  +  1 / 12 =1 / J

J = 4.8 hours that would take the 3 men to finish the task.

 Oct 4, 2020

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