three postal workers can sort a stack of mail in 30 minutes, 30 minutes, and 60 minutes, respectively. find how long it takes them to sort the mail if all three work together.

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asked Jul 13, 2022 46.9k views

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three postal workers can sort a stack of mail in 30 minutes, 30 minutes, and 60 minutes, respectively. find how long it takes them to sort the mail if all three work together.

Mathematics
high-school

Ddgd asked

by Ddgd

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2 Answers

2 votes

Answer:

it will take about 1/3 of the time (10 minutes)

Explanation:

Bas Van Dijk answered Jul 15, 2022

by Bas Van Dijk

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11 votes

Answer:

Explanation:

t/30+t/30+t/60=1

2t/60+2t/60+t/60=1

5t/60=1

5t=60

t=12 minutes

Splattne answered Jul 19, 2022

by Splattne

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