Concept explainers
Body mass index (BMI) is a number calculated from a person's weight and height. BMI provides a reliable indicator of body fatness for most people and is used to screen for weight categories that may lead to health problems. The formula for a person‘s BMI is
For an adult, a BMI value between 18.5 and 24.9 is healthy and considered normal.
(a) Calculate the BMI for a 6-ft, 2-in man who weighs 169 lb.
(b) Is this person underweight at a healthy weight, or overweight?
(a)
Interpretation:
The BMI of a man with a height of
Explanation of Solution
The formula used to calculate BMI is as follows:
The conversion of height
The relation between foot
The conversion factors used to convert
Therefore, the height is calculated to be
The conversion of the height
The relation between
The conversion factors used to convert
The relation between centimeter
The conversion factors used to convert
The answer is rounded off by dropping the last number, which is more than
The conversion of weight
The relation between
The conversion factors used to convert
The relation to convert
The conversion factors used to convert
The answer is rounded off by dropping the last number, which is equal to
Substitute the height as
Therefore, the body mass index of the man is
(b)
Interpretation:
Whether the person is underweight, has a healthy weight, or is overweight:
Explanation of Solution
The standard rule of BMI states that if the value of BMI is between
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