FTCE Professional Education Practice Exam

If 1 lb equals 0.45 kg, how many pounds are in 2 kg?

1. 3.5 lb

2. 4 lb

3. 4.5 lb

4. 5 lb

The correct answer is: 4.5 lb

To determine how many pounds are in 2 kg when 1 lb equals 0.45 kg, we start with the conversion factor provided. We know that 1 lb is equivalent to 0.45 kg, which can be rearranged to express pounds in terms of kilograms: 1 kg = 1 lb / 0.45 kg = 2.2 lb (approximately). Now, to find out how many pounds are in 2 kg, we multiply the number of kilograms (2 kg) by the conversion factor for lbs per kg: 2 kg * (2.2 lb / 1 kg) = 4.4 lb. Since we use approximate values and rounding, we conclude that 2 kg is approximately equal to 4.5 lb. This makes the chosen answer suitable, as it closely matches the calculated amount. This method clearly illustrates the conversion process using the known values and provides a logical pathway to arrive at the correct answer.