hi. plss help me solve this question. show the work step and write neatly. need it ASAP. good rating will be given. thank you so much

A tank initially contains of 50 litres of brine solution with 20 kg of dissolved salt. A brine containing 0.5 kg of salt per litre flows into the tank at 4 litresi'minute and the mixture is stirred. Simultaneously. the mixed solution ows out at 2 litreslminute. Find the quantity of salt in the tank at any time. t