Convert Lito’s weight of 84 kg to pounds. A. 184.5 lbs B. 184.6 lbs C. 184.7 lbs D. 184.8 lbs
The Correct Answer and Explanation is:
To convert Lito’s weight of 84 kilograms (kg) to pounds (lbs), we use the conversion factor:
1 kilogram = 2.20462 pounds
Step-by-step calculation:
84 kg×2.20462 (lbskg)=185.18808 lbs84 \, \text{kg} \times 2.20462 \, \left( \frac{\text{lbs}}{\text{kg}} \right) = 185.18808 \, \text{lbs}84kg×2.20462(kglbs)=185.18808lbs
Now, round the result to one decimal place:185.18808≈185.2 lbs185.18808 \approx 185.2 \, \text{lbs}185.18808≈185.2lbs
However, this does not match any of the multiple-choice options provided. Let’s double-check using fewer significant figures, as many practical conversions use a rounded factor:
1 kilogram ≈ 2.2 pounds
84 kg×2.2=184.8 lbs84 \, \text{kg} \times 2.2 = 184.8 \, \text{lbs}84kg×2.2=184.8lbs
Now, this matches Option D: 184.8 lbs, which is the best choice based on commonly accepted rounding in real-world or multiple-choice test settings.
✅ Correct Answer: D. 184.8 lbs
Explanation
To convert a mass from kilograms to pounds, one must apply a standard unit conversion factor. The metric system (used in most countries) employs kilograms, while the imperial system (used in the United States) measures body weight in pounds. The mathematical relationship between these two units is:
1 kilogram = 2.20462 pounds
This factor is derived from precise definitions of both the kilogram (based on the International System of Units) and the pound (defined by the avoirdupois system). To perform the conversion, the number of kilograms is multiplied by the conversion factor. In this case, Lito’s body weight is 84 kg. When 84 is multiplied by 2.20462, the result is approximately 185.188 pounds.
For simplicity and practicality, especially in non-scientific contexts such as health or fitness, the conversion factor is often rounded to 2.2. Using this approximate factor, the calculation becomes:84×2.2=184.8 lbs84 \times 2.2 = 184.8 \, \text{lbs}84×2.2=184.8lbs
This rounded value is easier to compute mentally and is often sufficient for most everyday purposes. In standardized testing or textbooks, rounded values are commonly used to make calculations more accessible. Thus, based on the approximate conversion, Lito’s weight in pounds is 184.8, which aligns with option D.
This demonstrates the importance of understanding when to use precise vs. approximate values in unit conversion problems.
