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Mathematics for IGCSE & O level - Rates (Section 1 - No. 43)

What is the mass of a foam plastic ball with a volume of 20 cm³ and a density of 0.3 g/cm³?
6 g
7 g
8 g
9 g

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Mass = Density x Volume. Mass = 0.3 g/cm³ x 20 cm³ = 6 g

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