Surface Area and Density Application of a Sphere
Surface Area and Density Application of a Sphere
Secondary 2
A spherical marble ball has a surface area of \(2.78\) cm\(^{2}\). Find
- its radius,
- the mass of \(150\) identical marble balls if they are made of glass of density \(2.57\)g/cm\(^{3}\).
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Answer:(i) \(0.470\text{ cm}\) (ii) \(168\text{ g}\)
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