A student weighs 1681b. What is the student’s weight in kilograms?
The correct answer and explanation is:
To convert a student’s weight from pounds to kilograms:
Given:
- Weight in pounds (lb) = 168 lb
- 1 kilogram (kg) = 2.20462 pounds
Step-by-step conversion:
Weight in kilograms=Weight in pounds2.20462\text{Weight in kilograms} = \frac{\text{Weight in pounds}}{2.20462} Weight in kilograms=1682.20462≈76.20 kg\text{Weight in kilograms} = \frac{168}{2.20462} \approx 76.20 \text{ kg}
✅ Final Answer:
The student’s weight is approximately 76.20 kilograms.
🧠 Explanation (300 words):
Weight is a measure of how heavy an object or person is. In the United States and a few other countries, pounds (abbreviated as lb) are commonly used to measure weight. However, in most other parts of the world and in scientific contexts, weight is measured using kilograms (kg), which is part of the metric system.
To convert pounds into kilograms, we use a standard conversion factor:
1 kilogram = 2.20462 pounds.
This means that a kilogram is a heavier unit—if you have a number in pounds, it will be smaller when converted into kilograms.
In this case, the student’s weight is 168 lb. To find out how much this is in kilograms, divide the number of pounds by 2.20462: 168÷2.20462≈76.20168 \div 2.20462 \approx 76.20
So, the student weighs about 76.20 kg.
Why is this conversion useful? In science and medicine, the metric system is the international standard. Doctors, scientists, and researchers often need weights in kilograms to calculate medication dosages, assess health status using BMI (Body Mass Index), or maintain consistency in research.
Furthermore, many travel or airline weight limits are also given in kilograms, so understanding how to convert between units helps in everyday situations.
By using this simple formula, anyone can convert between pounds and kilograms with ease.