A 200-gallon tank is half full of distilled water. At time t = 0, a solution containing 0.5 pound of concentrate per gallon enters the tank at the...

Total volume of the tank=200 gallon

Given that, tank is half full,

so remaining volume of the tank to be filled=200-100=100 gallon.

Since 5 gallons of solution comes into the tank per minute and 3 gallons of solution goes out each minute,

Net flow of solution in the tank=5-3= 2 gallons per minute.

Time required=`100/2=50` ` `

So, the time required for the tank be full = 50 minutes 

Total volume of the tank=200 gallon

Given that, tank is half full,

so remaining volume of the tank to be filled=200-100=100 gallon.

Since 5 gallons of solution comes into the tank per minute and 3 gallons of solution goes out each minute,

Net flow of solution in the tank=5-3= 2 gallons per minute.

Time required=`100/2=50` ` `

So, the time required for the tank be full = 50 minutes