A metal sample has a volume of $1240\text{ cm}^3$, to the nearest $20\text{ cm}^3$. Its mass is $7800\text{ g}$, to the nearest $100\text{ g}$. [Density = mass \div volume.]
(main)[3]
Calculate the lower bound for the density of the metal.
Worked solution & mark scheme
This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: “$6.2$” …