A person weighs 154 pounds. Convert this to kilograms. 1 lb = 454 grams.
The Correct Answer and Explanation is:
Conversion of 154 Pounds to Kilograms
To convert pounds to kilograms, we first convert pounds to grams, then grams to kilograms.
Given:
- 1 pound (lb) = 454 grams
- 1 kilogram (kg) = 1000 grams
- Weight = 154 pounds
Step 1: Convert pounds to grams 154 lb×454 g/lb=69,916 g154\ \text{lb} \times 454\ \text{g/lb} = 69,916\ \text{g}
Step 2: Convert grams to kilograms 69,916 g÷1000=69.916 kg69,916\ \text{g} \div 1000 = 69.916\ \text{kg}
✅ Final Answer: 154 pounds = 69.916 kilograms
Explanation
Converting weight from pounds to kilograms involves understanding the relationship between the imperial and metric systems. The imperial system, used primarily in the United States, includes pounds as a unit of mass. In contrast, most of the world uses the metric system, where mass is measured in grams and kilograms. For scientific, medical, and international purposes, conversions between these systems are often necessary to ensure consistency and accuracy.
The first step in this process is recognizing that 1 pound equals 454 grams. This value is an approximation commonly used in practical contexts, though the more precise conversion is 1 lb = 453.592 grams. In this problem, we use 454 grams per pound as specified.
To convert 154 pounds to grams, we multiply: 154×454=69,916 grams154 \times 454 = 69,916\ \text{grams}
This intermediate result represents the person’s weight in grams. However, grams are a relatively small unit, and for people’s body weight, kilograms are more commonly used in the metric system. Since 1 kilogram equals 1000 grams, we divide the total number of grams by 1000: 69,916÷1000=69.916 kilograms69,916 \div 1000 = 69.916\ \text{kilograms}
Thus, a person who weighs 154 pounds would weigh approximately 69.916 kilograms.
This conversion is important not just for general knowledge, but also in fields such as medicine, sports, and travel, where precise measurements and standardized units are essential for communication and calculation across different systems.
