Rainwater 2770

The garden tank for rainwater is cuboid in shape, the bottom of which is square, with a side 150 cm long and 80 cm high. How many 15-liter buckets do we need to drain the water from the tank?

Correct answer:

n =  120

Step-by-step explanation:

$$\begin{gathered} a=150\text{cm}\to \text{dm}=150:10\text{dm}=15\text{dm} \\ b=80\text{cm}\to \text{dm}=80:10\text{dm}=8\text{dm} \\ V=a^2\cdot b=15^2\cdot 8=1800{\text{dm}}^3 \\ {V}_1=15\text{l}\to {\text{dm}}^3=15\cdot 1{\text{dm}}^3=15{\text{dm}}^3 \\ n=V/V_1=1800/15=120 \end{gathered}$$

Try another example