Concept explainers
To estimate: The number of liters of water a human drinks in a lifetime.
Answer to Problem 28P
An average human drinks almost a hundred thousand liters of water in his lifetime.
Explanation of Solution
Introduction:
In order to estimate the amount of water an average human being drinks in his lifetime, the following assumptions are made:
First assumption is that for healthy living, one is advised to drink at least 3 liters of water each day.
Therefore, the number of liters of water a human drinks = 3 L.
Second assumption. With the vast improvements seen in health care the average lifetime of a human has increased over the period of time.
Hence, assume the average lifetime of a human to be 70 years.
If a human being, who consumes 3 L of water each day over a period of 70 years, the total amount he consumes in his lifetime is given by,
Rounding the value to the closest power of 10, one can estimate the amount of water consumed by an average human to be around a hundred thousand litres.
Conclusion:
Thus, an average human drinks almost a hundred thousand of water in his lifetime.
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