A large tank initially contains 50 gallons of brine in which there is dissolved 10 lb of salt. Brine containing 2 lb of dissolved salt per gallon flows into the tank at the rate of 5 gallons per minute. The mixture is kept uniform by stirring and the stirred mixture simultaneously flows out at the slower rate of 3 gallons per minute. How much salt is in

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Differential Equations

Have you ever observed the movement of the satellites and rockets or how the planets go around the sun in their orbits? How will you determine their motion? Definitely they follow some scientific laws and these kinds of problems are framed as differential equations.