Convert 105 pounds to kilograms
The correct answer and explanation is:
Correct Answer:
105 pounds = 47.63 kilograms (rounded to two decimal places)
Explanation (300 words):
To convert pounds (lbs) to kilograms (kg), we use a standard conversion factor:
1 pound = 0.45359237 kilograms
So, to convert 105 pounds to kilograms, multiply: 105 lbs×0.45359237 (kglb)=47.62719885 kg105 \, \text{lbs} \times 0.45359237 \, \left(\frac{\text{kg}}{\text{lb}}\right) = 47.62719885 \, \text{kg}
Rounding this value to two decimal places: 105 lbs=47.63 kg105 \, \text{lbs} = \mathbf{47.63 \, kg}
Why the Conversion Matters:
Understanding unit conversions between pounds and kilograms is important in many real-life situations—especially in fields like medicine, nutrition, fitness, travel, and science. For example, a doctor may need to know a patient’s weight in kilograms to determine appropriate medication dosages. Likewise, a traveler using a metric-only scale will need to convert luggage weight from pounds to kilograms.
In the United States, pounds are commonly used to measure weight, whereas most other countries—including those using the metric system—measure weight in kilograms. This can cause confusion if someone is unfamiliar with the conversion.
To make quick estimates, many people use the rounded conversion:
1 kg ≈ 2.2 lbs, which means: To estimate kg from lbs: divide by 2.2\text{To estimate kg from lbs: divide by 2.2}
So for 105 lbs: 105÷2.2≈47.73 kg(close to the exact answer)105 \div 2.2 \approx 47.73 \, \text{kg} \quad \text{(close to the exact answer)}
However, for precise scientific or medical purposes, it’s best to use the full conversion factor:
1 lb = 0.45359237 kg
Conclusion:
105 pounds equals 47.63 kilograms. Accurate conversion is crucial in many disciplines and helps bridge differences between imperial and metric systems.