The Gauge on an E Cylinder of O₂ Reads 800

Multiple Choice

The gauge on an E cylinder of O₂ reads 800 psig. Approximately how long would the contents of this cylinder last, until completely empty, at a flow of 3 L/min?

A) 1 hr 15 min
B) 1 hr 45 min
C) 2 hr 10 min
D) 2 hr 40 min