A piece of metal has volume \(1240\text{ cm}^3\), correct to the nearest \(20\text{ cm}^3\).
The mass of the piece of metal is \(7800\text{ g}\), correct to the nearest \(100\text{ g}\).
Calculate the lower bound of the density of the metal.[3]
[Density \(=\) mass \(\div\) volume.]
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