Question

A room containging 1000 cubic feet of air is orginally free of carbon monoxide. Beginning at time t=0, cigarette smoke containing 11% carbon monoxide is blown into the room at the rate of 2 ft^(3) / min, and the well circulated mixture leaves the room at the same rate. Find the time when concentration of carbon monoxide in the room reaches 0.014 percent. (Extended exposure to the concentration is dangerous) Please neat with your answer.

Answer 1