Asked by Anonymous
A tank is filled in 9 hours and drained in 11 hours. How long will it take to fill the tank if the drain is left half open
Answers
Answered by
Steve
every hour it fills 1/9 and drains 1/22
1/9-1/22 = 13/198
So, it will take 198/13 = 15.23 hours
1/9-1/22 = 13/198
So, it will take 198/13 = 15.23 hours
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