High School

You're trying to convert 60 grains to grams. Which set of equivalents should you use to solve your problem?

A. 1 grain = 60 mg; 1 g = 1,000 mg
B. 1 grain = 65 mg; 1 g = 1,000 mg
C. 1 grain = 0.0648 g

Answer :

To convert 60 grains to grams, you should use the equivalent: B) 1 grain = 65 mg; 1 g = 1,000 mg

Using this set of equivalents:

  1. Convert grains to milligrams:
    [tex]60 \text{ grains} \times 65 \text{ mg/grain} = 3900 \text{ mg}[/tex]

  2. Convert milligrams to grams:
    [tex]3900 \text{ mg} \div 1000 \text{ mg/g} = 3.9 \text{ g}[/tex]

So, to convert 60 grains to grams, we use:
1 grain = 65 mg; 1 g = 1,000 mg

Thus, 60 grains can be converted to 3.9 grams.

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