Three items were bought at a car boot sale
Item A Item B Item C
Mass = 42 grams Mass = 87.5 grams Mass = 147 grams
Volume = 2 cm (cubed) Volume = 5cm (cubed) Volume = 7cm (cubed)
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Step-by-step explanation:
The mass of platinum with the given volumes would be ...
A: (2 cm³)(21 g/cm³) = 42 g . . . matches the given mass
B: (5 cm³)(21 g/cm³) = 105 g . . . greater than the given mass, which is not platinum
C: (7 cm³)(21 g/cm³) = 147 g . . . matches the given mass
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Item B is too light to be platinum.
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