Question

how would one convert 125 lb to kilograms (1 oz = 28 g)?
a. 125 lb×\frac{16 oz}{1 lb}×\frac{28 g}{1 oz}
b. 125 lb×\frac{28 g}{1 oz}×\frac{1 kg}{1000 g}
c. 125 lb×\frac{28 g}{1 oz}
d. 125 lb×\frac{16 oz}{1 lb}×\frac{28 g}{1 oz}×\frac{1 kg}{1000 g}

Explanation:

Step1: Convert pounds to ounces

We know that 1 lb = 16 oz. So to convert 125 lb to oz, we multiply 125 lb by $\frac{16\ oz}{1\ lb}$.

Step2: Convert ounces to grams

Given 1 oz = 28 g, so we multiply the result from step 1 by $\frac{28\ g}{1\ oz}$.

Step3: Convert grams to kilograms

Since 1 kg = 1000 g, we multiply the result from step 2 by $\frac{1\ kg}{1000\ g}$.
So the correct conversion is $125\ lb\times\frac{16\ oz}{1\ lb}\times\frac{28\ g}{1\ oz}\times\frac{1\ kg}{1000\ g}$.

Answer:

D. 125 lb x $\frac{16\ oz}{1\ lb}$ x $\frac{28\ g}{1\ oz}$ x $\frac{1\ kg}{1000\ g}$