Express 160lb in kilograms round 2 decimal places
The Correct Answer and Explanation is:
To convert 160 pounds (lb) into kilograms (kg), we use the conversion factor between pounds and kilograms:
1 pound (lb) = 0.45359237 kilograms (kg).
Step 1: Set up the conversion formula
To convert from pounds to kilograms, multiply the weight in pounds by the conversion factor:
[
\text{Weight in kilograms} = \text{Weight in pounds} \times 0.45359237
]
Step 2: Perform the calculation
Now, apply this formula to convert 160 pounds:
[
\text{Weight in kilograms} = 160 \times 0.45359237
]
[
\text{Weight in kilograms} = 72.5747792
]
Step 3: Round the result
To express the weight in kilograms to two decimal places, round 72.5747792 to two decimal places:
[
\text{Rounded weight in kilograms} = 72.57 \, \text{kg}
]
Final Answer:
160 lb = 72.57 kg
Explanation of the Conversion Process:
Weight can be measured in various units, and different systems use different units of measurement. The imperial system, which is commonly used in the United States, measures weight in pounds, while the metric system, used in most other parts of the world, measures weight in kilograms. Therefore, conversions between pounds and kilograms are essential when working with different measurement systems, especially in scientific, medical, and international contexts.
The most accurate conversion factor from pounds to kilograms is 0.45359237, but for practical purposes, we often round it to a few decimal places. By multiplying the number of pounds by the conversion factor, we obtain the corresponding weight in kilograms.
In this case, multiplying 160 pounds by 0.45359237 gives 72.5747792 kilograms. The final result is then rounded to two decimal places, resulting in 72.57 kg. Rounding ensures the result is in a usable form without excess precision. This is common in everyday calculations and measurements where extremely precise values aren’t necessary.
This method of conversion is essential for comparing weights across systems and ensuring consistency in measurements, especially in contexts like health, fitness, and global trade.