A Tank Contains $1050 \mathrm {~L}$ Of Brine With $20 \mathrm {~kg}$

Short Answer

A tank contains $1050 \mathrm {~L}$ of brine with $20 \mathrm {~kg}$ of dissolved salt. Pure water enters the tank at a rate of $16 \mathrm {~L} / \mathrm { min }$ . The solution is kept thoroughly mixed and drains from the tank at the same rate. How much salt is in the tank after 20 minutes?