SOLUTION:
A winery has a vat with two pipes leading to it. The inlet pipe can fill the vat in 3
​hours, while the outlet pipe can empty it in 9
hours. How long will it take
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-> SOLUTION:
A winery has a vat with two pipes leading to it. The inlet pipe can fill the vat in 3
​hours, while the outlet pipe can empty it in 9
hours. How long will it take
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The inlet adds of the tank volume each hour.
The outlet drains of the tank volume per hour.
The net inflow is positive difference - = = of the tank volume per hour.
It means that the tank will be filled in = 4.5 hours, if both pipes are open.
Solved.
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It is a typical joint work problem.
