Find the orthogonal trajectories of each given family Also sketch several members of each family 1 y e x c 2 y ce x A tank originally contains 200 liters of fresh water i e contains 0 grams of salt Then water containing 1 2 grams of salt per liter is pumped into the tank at a rate of 2 liters per minute and the well stirred mixture leaves the tank at the same rate Find the amount of salt in the tank at time t after the process started