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3 pumps,working 8 hours a day,can empty a tank in 2 days. how many hours a day 4 pumps works to empty the tank in 1 day?

1
12

12 hours

yes u are right

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12

12 hours

yes u are right

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1 pump in 1 hr can finish piece of work

so 4 pumps in one day can finish the work in x hours

1 pump in 1 hr can finish

So 4 pumps in