Sandbox

How much m³ of sand is needed to fill the sandbox on the field, if it has the shape of a circle with a diameter of 3 m and is 25 cm deep?

Correct answer:

V =  1.7671 m³

Step-by-step explanation:

$$\begin{gathered} D=3\text{ m } \\ h=25\text{ cm}\to \text{ m}=25\mathrm{/}100\text{ m}=0.25\text{ m } \\ {S}_1=\pi \cdot (D\mathrm{/}2{)}^2=3.1416\cdot (3\mathrm{/}2{)}^2\doteq 7.0686{\text{m}}^2 \\ V=S_1\cdot h=7.0686\cdot 0.25=1.7671{\text{m}}^3 \end{gathered}$$

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