How many minutes of oxygen do you have left if half of an E-cylinder oxygen tank remains at a flow rate of 3 L/min?

To determine how many minutes of oxygen remain in an E-cylinder when half of it is left at a flow rate of 3 liters per minute, you begin with understanding the capacity of an E-cylinder. An E-cylinder typically contains about 660 liters of oxygen when full. Therefore, if half of the tank remains, you have approximately 330 liters left.

Next, you can calculate the duration the remaining oxygen will last by dividing the volume of oxygen remaining by the flow rate:

330 liters ÷ 3 liters/minute = 110 minutes.

This calculation shows that with half an E-cylinder remaining and a flow rate of 3 L/min, you will have approximately 110 minutes of oxygen left, making it the correct response.