Collect rain water

The garden water tank has a cylindrical shape with a diameter of 80 cm and a height of 12 dm. How many liters of water will fit into the tank?

Correct answer:

V =  603.2 l

Step-by-step explanation:

$$\begin{gathered} D=80\text{cm}\to \text{dm}=80:10\text{dm}=8\text{dm} \\ h=12\text{dm} \\ r=D/2=8/2=4\text{dm} \\ V=\pi \cdot r^2\cdot h=3.1416\cdot 4^2\cdot 12=603.2\text{l} \end{gathered}$$

Try another example