The length of a hall is $20 \mathrm{m}$ and width is $16 \mathrm{m}$. The sum of the areas of the floor and the flat roof is equal to the sum of the areas of four walls. Find the height of the wall (in $\mathrm{cm}$). (Correct up to two decimal point)

The paint in a certain container is sufficient to paint an area equal to $9.375 {\mathrm{m}}^2$. How many bricks of dimensions $22.5 \mathrm{cm} \times 10 \mathrm{cm} \times 7.5 \mathrm{cm}$ can be painted using the point of this container?

Find the volume in $\mathrm{cu}. \mathrm{dm}$ of the cube whose side is:

$1.5 \mathrm{m}$