Defensive 45341

The boys want to build a defensive wall out of the snow for the ballpark. They want it to be 5 meters long and 1.5 meters high. They can make and transfer 50 cm cubes from snow. How many such cubes must he make to build his wall?

Correct answer:

n =  30

Step-by-step explanation:

$$\begin{gathered} a=5\text{m} \\ b=1.5\text{m} \\ x=50\text{cm}\to \text{m}=50:100\text{m}=0.5\text{m} \\ {n}_1=a/x=5/0.5=10 \\ {n}_2=b/x=1.5/0.5=3 \\ n=n_1\cdot n_2=10\cdot 3=30 \end{gathered}$$

Try another example