How much oxygen does a person consume in a day?
The average adult, when resting, inhales and exhales about 7 or 8 litres of air per minute.That totals about 11000 litres of air per day.Inhaled air is 20% oxygen and nearly 15% is exhaled.Therefore a human consumes about 550 litres of pure oxygen per day, Based on a market survey. We found that the average cost of a 2.75 litre portable oxygen cylinder is Rs.6500. At this rate, a human consumes oxygen worth about Rs.13 lakhs per day.