Sphere Calculation Involving Surface Area and Mass
Sphere Calculation Involving Surface Area and Mass
Secondary 2
A spherical metal ball has a surface area of \(81\pi \)cm\(^{2}\). Find
- its radius,
- the mass of \(51\) identical metal balls if they are made of metal of density \(6.85\)g/cm\(^{3}\).
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Answer:(i) \(4.5\text{ cm}\) (ii) \(133\text{ kg}\)
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