If an oxygen bottle delivers 7 cubic feet of oxygen in 4

Last updated: 7/22/2022

If an oxygen bottle delivers 7 cubic feet of oxygen in 4 minutes at 27,000 feet and -65 degrees F. How much will the system deliver in 13 minutes? Note: this is a direct proportion. 22.75 cu.ft. 17.25 cu.ft. 14cu.ft.