How many kilograms are in 30.4 lb?
A) 13.8 kg
B) 14 kg
C) 67 kg
D) 66.88 kg
E) 66.9 kg
The correct answer and explanation is :
To convert pounds (lb) to kilograms (kg), use the standard conversion factor:
1 pound (lb) = 0.45359237 kilograms (kg)
Step-by-Step Calculation:
30.4 lb × 0.45359237 kg/lb = ?
[
30.4 \times 0.45359237 = 13.789209048 \, \text{kg}
]
Rounded to one decimal place, the result is:
13.8 kg
Correct Answer:
A) 13.8 kg
300-Word Explanation:
Understanding how to convert between different units of measurement is essential in many fields, including healthcare, science, engineering, and everyday life. The question asks us to convert 30.4 pounds (lb) into kilograms (kg).
The key to solving this problem is knowing the conversion factor between pounds and kilograms. The standard and widely accepted conversion factor is:
1 pound = 0.45359237 kilograms
To convert from pounds to kilograms, multiply the number of pounds by this conversion factor.
So, for 30.4 pounds:
[
30.4 \times 0.45359237 = 13.789209048
]
This result tells us that 30.4 pounds is approximately 13.789 kilograms. Rounding this number to one decimal place—a common practice in scientific and medical settings for clarity and practicality—gives 13.8 kg.
Now, let’s evaluate the answer options:
- A) 13.8 kg – ✅ Correct (matches the accurate rounded result)
- B) 14 kg – Too high (rounds up beyond appropriate precision)
- C) 67 kg – Way too high, likely a misinterpretation or error
- D) 66.88 kg – Incorrect, not related to correct conversion
- E) 66.9 kg – Also incorrect, not tied to the real value
Only Option A is mathematically and scientifically accurate.
This conversion is particularly important in nursing and healthcare settings, where medications, body weight assessments, and fluid volumes often require unit conversions to ensure patient safety and treatment accuracy.