SOLUTION: Through postal workers can sort of stack of mail in 10 minutes 15 minutes and 30 minutes respectively find out how long it takes them to sort them out if all three work together
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Question 959786: Through postal workers can sort of stack of mail in 10 minutes 15 minutes and 30 minutes respectively find out how long it takes them to sort them out if all three work together Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Three postal workers can sort a stack of mail in 10 minutes 15 minutes and 30 minutes respectively find out how long it takes them to sort them out if all three work together.
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Equation:
rate + rate + rate = together rate
(1/10) + (1/15) + (1/30) = 1/x
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450x + 300x + 150x = 4500
900x = 4500
x = 5 minutes (time for them to do the job together)
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Cheers,
Stan H.
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