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Estimate how many litres of air you breathe in one day.

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We take about 20,000 breaths daily. Each breath is roughly 0.5 litres. Multiplying these gives an estimate of 10,000 litres of air breathed in one day, which is a reasonable, approximate and useful figure.

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  1. To estimate air intake, consider that an adult takes roughly 12 to 15 breaths per minute, totaling about 20,000 breaths daily. Assuming each breath has a volume of approximately 0.5 litres, multiplying these figures yields a total of 10,000 litres of air per day. While exact breathing rates vary based on activity levels, this approximation provides a useful, scientifically grounded perspective on our body’s daily oxygen-related needs.

     

    For more NCERT Solutions for Class 9 Science Exploration Chapter 1 – Exploration: Entering the World of Secondary Science Extra Questions & Answer (2026-27)

    https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-1/

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