A pound is approximately 0.45 kilograms. A person weighs 87 kilograms. What is the person’s weight, in pounds, when rounded to the nearest whole number?
The Correct Answer and Explanation is:
To convert a person’s weight from kilograms to pounds, we need to know the conversion factor. According to the information provided, 1 pound ≈ 0.45 kilograms. Therefore, to convert from kilograms to pounds, we divide the person’s weight in kilograms by 0.45.
Step-by-step calculation:
- Weight in kilograms: The person weighs 87 kilograms.
- Conversion factor: 1 pound ≈ 0.45 kilograms.
- To find the person’s weight in pounds, we divide 87 kilograms by 0.45 kilograms per pound:
Weight in pounds=870.45=193.33\text{Weight in pounds} = \frac{87}{0.45} = 193.33Weight in pounds=0.4587=193.33
- Rounding to the nearest whole number: The result, 193.33, rounds to 193 when we round it to the nearest whole number.
Final Answer:
The person’s weight is approximately 193 pounds.
Explanation:
The conversion from kilograms to pounds relies on the known ratio between the two units of mass. Since 1 pound equals 0.45 kilograms, we divide the weight in kilograms by 0.45 to convert to pounds. Once we perform the division, we obtain a decimal number, which is then rounded to the nearest whole number to give the final result. The rounding step is important when you need an answer that’s easier to understand or use, especially when dealing with measurements in practical settings.
