## Task 4 - 040514

In Mücheln (Geisel Valley, District of Halle), the longest railway bridge in the GDR was completed. It consists of 7 identical bridge arches.

For one bridge arch, $147 \mathrm{~m}^{3}$ of concrete was used. $1 \mathrm{~m}^{3}$ of concrete has a mass of $24 \mathrm{dt}$. How many tons of concrete were needed for the bridge construction? (Round to the nearest whole ton!)
7 (arches) $\cdot 147 \mathrm{~m}^{3} \cdot 24 \frac{\mathrm{dt}}{\mathrm{m}^{3}}=24696 \mathrm{dt}$. In total, approximately 2470 tons of concrete are required.