Determine the number of pounds in 10.5 kilograms. a. 25.5 b. 24.6 c. 21.9 d. 23.1
The Correct Answer and explanation is :
To convert kilograms to pounds, you can use the conversion factor that 1 kilogram is approximately equal to 2.20462 pounds. Therefore, to determine how many pounds are in 10.5 kilograms, you can multiply the number of kilograms by this conversion factor:
[
10.5 \, \text{kg} \times 2.20462 \, \text{lbs/kg} \approx 23.149 \, \text{lbs}
]
Now, rounding this to one decimal place gives us approximately 23.1 pounds.
Explanation of the Conversion Process
- Understanding the Units: Kilograms (kg) are part of the metric system, which is widely used around the world for scientific and everyday measurements. Pounds (lbs) are part of the imperial system, commonly used in the United States. Knowing how to convert between these two systems is important for various applications, including cooking, travel, and scientific research.
- Using the Conversion Factor: The conversion factor from kilograms to pounds is derived from the definition of the kilogram and the pound. One kilogram is defined as being equal to approximately 2.20462 pounds. This is a constant value that allows us to perform the conversion accurately.
- Performing the Calculation: To convert 10.5 kg to pounds, we multiply by the conversion factor. This straightforward multiplication yields a direct answer without needing to memorize multiple conversion factors. It’s also useful to note that the multiplication will give you a value in pounds, which you can round as needed for practical purposes.
- Rounding: After performing the multiplication, the result is about 23.149 lbs. Rounding this to one decimal place results in 23.1 lbs. In many contexts, such as nutrition or weight reporting, rounding to one decimal place is sufficient and standard practice.
Thus, the correct answer to the question is d. 23.1 pounds.