Cuprum

From the 1600 mm long sheet of copper plate 2 mm thickness, we have separated over the whole length of the belt weighing 6000 g. Calculate belt width if one dm³ copper weighs 8.9 kg.

Correct answer:

b =  210.7 mm

Step-by-step explanation:

$$\begin{gathered} a=1600mm=16dm \\ h=2mm=0.02dm \\ m=6000g=6kg \\ m=\rho V=\rho abh \\ b=\frac{m}{\rho ah}=\frac{6}{8.9\cdot 16\cdot 0.02}\cdot 100=210.7\text{mm} \end{gathered}$$

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