Cylindrical 7804

The garden children's pool has the shape of a cylinder with a base diameter of 3.2 m and a depth of 60 cm. The water reaches 10 cm below the top edge. How many m² of the surface of the cylindrical wall of the pool is above the water? Rounds to the whole m².

Correct answer:

S =  1 m²

Step-by-step explanation:

$$\begin{gathered} D=3.2{\text{m}}^2 \\ h=10\text{cm}\to \text{m}=10:100\text{m}=0.1\text{m} \\ S=\pi \cdot D\cdot h=3.1416\cdot 3.2\cdot 0.1=1{\text{m}}^2 \end{gathered}$$

Try another example