Separable Differential Equations: Videos & Practice Problems

A reservoir initially contains $300$ gallons of a saline solution with $75$ pounds of dissolved salt. Clean water flows into the reservoir at a rate of $6$ gallons per minute, while the mixed solution exits the reservoir at a rate of $8$ gallons per minute through an outlet pipe. Let $Q\left(t\right)$ be the pounds of salt in the reservoir at time $t$ in minutes. After how many minutes will the tank contain exactly $50$ pounds of salt? Round your answer to $1$ decimal place.