Calculate 5870

Calculate the volume of the area covered with three rows of 7 tiles. One tile is 30 cm wide and 45 cm high and ends with circular arches at two ends.
Enter the result in m².

Correct answer:

S =  2.835 m²

Step-by-step explanation:

$$\begin{gathered} a=30\text{cm}\to \text{m}=30:100\text{m}=0.3\text{m} \\ b=45\text{cm}\to \text{m}=45:100\text{m}=0.45\text{m} \\ n=3\cdot 7=21 \\ S=n\cdot a\cdot b=21\cdot 0.3\cdot 0.45=2.835{\text{m}}^2 \end{gathered}$$

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