Mathematics, 20.09.2021 22:10 dakodahepps
At a dairy plant, a milk tank can be filled in 6 hours (using the in-valve). Using the out-valve, the tank can be emptied in 10 hours. If both valves are open and milk is being pumped into the tank, how long will it take to fill the tank?
Answers: 2
![\begin{aligned}\dfrac{1}{6} - \dfrac{1}{10} &= \dfrac{1}{6}\cdot\bold{\dfrac{5}{5}} - \dfrac{1}{10}\cdot\bold{\dfrac{3}{3}}\\[0.5em]&= \dfrac{5}{30} - \dfrac{3}{30}\\[0.5em]& = \dfrac{2}{30}\\[0.5em]& = \dfrac{1}{15}\end{aligned}](/tpl/images/2471/2152/6748a.png)
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At a dairy plant, a milk tank can be filled in 6 hours (using the in-valve). Using the out-valve...
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