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## Grade 11 Volume CCSS: HSG-GMD.A.3, HSG-MG.A.2

- $293.32
- $402.11
- $870.33
- $1,434.38

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Sarah and Tim are getting married, and their wedding rings will both made of platinum. The rings are both shaped like a hollow cylinder, both having a width of 3 mm and a thickness of 1.5 mm (the thickness is the difference between the inner diameter and the outer diameter). The inner diameter of Sarah's ring is 16 mm, and the inner diameter of Tim's ring is 17.5 mm. If the density of platinum is [math]21.45 \ "g"//"cm"^3[/math], and the cost of platinum is about $36.33 per gram, what is the cost (for materials) of the two rings?

- $293.32
- $402.11
- $870.33
- $1,434.38

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