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F1 fills one-eighth per minute, F1 & F2 together fill one-fifth per minute, so F2 is responsible for one-fifth less one-eighth ie three-fortieths per minute so F2 alone would take 40/3 ie 13 min 20 sec.

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How long will it take a tank to be be filled by one pipe in 9 minutes and drained by another pipe in 12 minutes?

We're guessing that the question is trying to ask:If one pipe can fill the tank in 9 minutes, and another pipecan empty the tank in 12 minutes, how long does it take thetank to fill if both pipes are open ?So that's the question we'll go ahead and answer.The first pipe fills 1/9th of the tank every minute.The second pipe empties 1/12th of the tank every minute.When they're both open, (1/9 - 1/12) of the tank fills every minute.(1/9) - (1/12) = (4/36) - (3/36) = 1/36Since 1/36th of the tank fills every minute, it takes 36 minutes to fill.


How many minutes from 530 t0 600?

30 minutes, IF (both are AM OR both are PM) AND (both are on the same day).


A winery has a vat with two valves The inlet valve can fill the cat in 6 hours The outlet can empyty it in 10 hours How long with it take to fill the vat if both valves are left open?

The inlet valve fills 1/6th of the vat in an hour.The outlet valve drains 1/10th of the vat in an hour.When they are both open, (1/6th - 1/10th) of the vat fills in an hour.(1/6 - 1/10) = (5/30 - 3/30) = 2/30 = 1/15th fills in one hour.So with both valves open, it takes 15 hours to fill the vat.


If a Watch beeps every 21 minutes and a second watch beeps every 30 minutes when will they beep at the same time?

To find when both watches beep at the same time, we need to determine the least common multiple (LCM) of their beep intervals: 21 minutes and 30 minutes. The LCM of 21 and 30 is 210 minutes. Therefore, both watches will beep at the same time again after 210 minutes, or 3 hours and 30 minutes.


What is 45 minutes divided into 60 minutes?

0.75

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