: The use of Body Mass Index (BMI) to categorize individuals as overweight (25–30) or obese (30+). Question Types & Difficulty This passage is classified as
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– For over a century, the kilogram was defined by a physical object: a cylinder of platinum-iridium alloy housed in a vault near Paris. Known as the International Prototype Kilogram (IPK), it was the sole official standard. But this “Le Grand K” had a fundamental flaw: it was not portable. Scientists could not carry it to laboratories worldwide without risking contamination or damage. : The use of Body Mass Index (BMI)
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