QUESTION 25 person weighs 77.1 kg. What is his weight in pounds? 1/b 453.69 154 pounds 30.8 pounds 35.0 pounds 170 pounds
The Correct Answer and Explanation is:
To convert kilograms to pounds, we use the conversion factor:
1 kilogram = 2.20462 pounds
Step-by-step conversion:
Given:
Weight = 77.1 kilograms
Conversion factor:
1 kg=2.20462 lb1 \, \text{kg} = 2.20462 \, \text{lb}
Now, multiply: 77.1 kg×2.20462 lbkg=169.962402 lb77.1 \, \text{kg} \times 2.20462 \, \frac{\text{lb}}{\text{kg}} = 169.962402 \, \text{lb}
Rounded to the nearest whole number, this gives:
≈ 170 pounds
Explanation
To understand how to convert a person’s weight from kilograms (kg) to pounds (lb), it’s essential to know the relationship between these two units of mass. The kilogram is the standard unit of mass in the metric system, commonly used in most countries, while the pound is a unit used in the imperial system, mostly in the United States.
The standard conversion factor between kilograms and pounds is: 1 kg=2.20462 lb1 \, \text{kg} = 2.20462 \, \text{lb}
This means that every kilogram is approximately equal to 2.20462 pounds. To convert a weight given in kilograms to pounds, you multiply the number of kilograms by this factor.
In this case, the person’s weight is 77.1 kg. Multiplying this by 2.20462 gives approximately 169.96 lb, which can be rounded to 170 lb for simplicity. Rounding is common in everyday use, especially when dealing with body weight, as minor decimal differences are usually not significant.
Let’s also briefly mention why conversions like this matter. In healthcare, fitness, travel, and science, knowing how to shift between metric and imperial systems is crucial. If a patient from a metric-using country reports their weight in kilograms, a U.S.-based healthcare worker needs to convert it to pounds for documentation or medication dosing.
Lastly, note the incorrect answers:
- 154 lb is too low.
- 30.8 lb and 35.0 lb are drastically incorrect.
- 170 lb is the closest and correct answer.
✅ Correct Answer: 170 pounds
