Approximately what percentage of the human body (in male and female adults) is comprised of water?
A. 0.4
B. 0.8
C. 0.5
D. 0.6
Answer (2)
The human body is approximately 50-65% water, which varies based on factors like age and sex. Among the provided options, 60% (0.6) is closest to this average. Therefore, the correct answer is option D (0.6).
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Convert the given options to percentages: 0.4 = 40%, 0.8 = 80%, 0.5 = 50%, 0.6 = 60%.
Recall that the approximate percentage of water in the human body is around 50-65%.
Compare the calculated percentages to the approximate percentage.
Choose the closest option: 60%. The final answer is 0.6 .
Explanation
Understanding the Problem The question asks for the approximate percentage of water in the human body (male and female adults). The options are 0.4, 0.8, 0.5, 0.6. We need to convert these to percentages and compare them to the known approximate percentage of water in the human body.
Converting to Percentages First, let's convert the given options to percentages:
0.4 = 40%
0.8 = 80%
0.5 = 50%
0.6 = 60%
Recalling the Approximate Percentage The approximate percentage of water in the human body is around 50-65%, with variations depending on age, sex, and hydration levels.
Choosing the Closest Option Comparing the percentages we calculated to the approximate percentage of water in the human body, we see that 60% (0.6) is the closest value.
Final Answer Therefore, the approximate percentage of water in the human body is 60%.
Examples
Understanding the composition of the human body, including the percentage of water, is crucial in various fields such as medicine, nutrition, and sports science. For example, knowing that the human body is approximately 60% water helps doctors determine appropriate hydration levels for patients, and it helps athletes understand the importance of staying hydrated during physical activity. In nutrition, this knowledge aids in formulating balanced diets that ensure adequate water intake for maintaining overall health. This concept is also important in understanding how dehydration affects the body's functions and performance.
