MCQ Detailed View

The pound (lb) is a unit of mass commonly used in the imperial system of measurement, while the gram (g) is a unit of mass in the metric system (SI unit system). Since different countries use different measurement systems, it is important to know the conversion between pounds and grams.

The internationally agreed definition states that:
1 pound = 0.45359237 kilograms (exact).

Since 1 kilogram = 1000 grams, we can calculate:
0.45359237 × 1000 = 453.59237 grams.

Thus, 1 pound = about 453 grams. For simplicity, in exams and daily use, this value is rounded to 453 g.

This conversion is particularly useful because the imperial system is widely used in the United States and the UK, while the metric system is used almost everywhere else, including Pakistan, Europe, and scientific work worldwide. Knowing this equivalence helps in trade, cooking, sports, medicine, and physics calculations.

For example:

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  In cooking, recipes may list ingredients in pounds in the US but in grams elsewhere.

  
  


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  In sports, athletes’ body weights are often listed in pounds, but international events prefer kilograms or grams.

  
  


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  In physics and engineering, accurate conversions are essential to avoid calculation errors, especially in international projects.

  
  

It’s also important to note that while grams and kilograms are part of the SI (metric system), the pound is defined in terms of kilograms to maintain global consistency.

Therefore, the correct answer is 453 grams (Option B). This represents the rounded but widely accepted conversion of 1 pound to grams in everyday science and physics.