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Question 48

Correct statement is:

We need to identify the correct statement about human consumption of food and air.

An average human consumes approximately 1.5-2 kg of food per day, 2-3 L of water per day, and about 15,000-20,000 L of air per day (at ~15 breaths/min, ~0.5 L per breath = 10,800 L/day).

By mass, air consumption $$\approx 15,000 \times 1.2 \text{ g/L} \approx 18$$ kg per day, while food consumption $$\approx 1.5$$ kg per day (excluding water).

Thus, $$\dfrac{\text{Air consumed}}{\text{Food consumed}} \approx \dfrac{18}{1.5} \approx 12-15$$ times, indicating that an average human consumes nearly 15 times more air than food.

The correct answer is Option B: An average human being consumes nearly 15 times more air than food.

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