Empty and full

An empty can has a mass of 1/6 lb. When it is filled with sand, it has a mass of 7/12 lb. Find the mass of the sand in the can?

Correct answer:

s =  0.4167 lb

Step-by-step explanation:

$s={\displaystyle \frac{7}{12}}-{\displaystyle \frac{1}{6}}={\displaystyle \frac{5}{12}}=0.4167\text{ lb}$

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