Traditional units of length, like a “foot” or a “yard,” can be unreliable because they vary from person to person or place to place. For example, one person’s foot might be longer than another person’s, making measurements inconsistent. Also, these units are not based on a standard system, so they are harder to use for accurate or scientific purposes. Using standardized units like meters or centimeters ensures that measurements are the same everywhere and more precise.
This question related to Chapter 5 Science Curiosity Class 6th NCERT.
From the Chapter 5. Measurement of Length and Motion.
Give answer according to your understanding.
Because they vary depending on the individual’s body size.
Explanation: Measurements based on body parts (e.g., foot or handspan) vary, hence standardized units like metres are preferred.
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