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Given (1 , text{kg} = 2.20 , text{lbs}), how many kilograms are in 125 lbs?

A. 56.82 kg
B. 57.00 kg
C. 58.05 kg
D. 60.00 kg

1 Answer

4 votes

Final answer:

To convert 125 pounds to kilograms, use the conversion rate of 1 kg = 2.20 lbs. After setting up a proportion and performing the calculation, the result is approximately 56.81818 kg. Rounding to the nearest hundredth as per the options given, the correct answer is A. 56.82 kg.

Step-by-step explanation:

To convert pounds to kilograms, we use the given conversion rate 1 kg = 2.20 lbs. To find how many kilograms are in 125 lbs, we set up the following proportion:

1 kg / 2.20 lbs = x kg / 125 lbs.

To solve for x, we cross-multiply and divide:

x = (125 lbs × 1 kg) / 2.20 lbs.

Next, we perform the calculation:

x = 125 / 2.20.

x ≈ 56.81818 kg.

Since the conversion factor of 2.20 lbs has three significant figures, our answer should also have three significant figures. Rounding to three significant figures, we get:

x ≈ 56.8 kg.

Therefore, the correct answer is A. 56.82 kg, when rounded to the nearest hundredth as given by the options.

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