One trolly is full of bricks. It is $4 \mathrm{m}$ long, $2 \mathrm{m}$ wide, and $60 \mathrm{cm}$ deep. One brick is of size $20 \mathrm{cm}\times 10 \mathrm{cm}\times 6 \mathrm{cm}$. How many bricks are there in the trolly?

If '$V$' is the volume of a cuboid of dimensions $a\times b\times c$ and '$S$' is its surface area, then prove that $\frac{1}{V}=\frac{2}{S}\left(\frac{1}{a}+\frac{1}{b}+\frac{1}{c}\right)$.

A metal cube is completely submerged in a cylindrical vessel containing water. The diameter of the vessel is $30cm,$ the level of water is raised by $1\frac{41}{99} cm$ . The length of the edge of the cube is:

If side of each cube is $3 \text{cm}$. Then Volume of given figure is 

A hall is $15 \mathrm{m}$ long and $12 \mathrm{m}$ broad. If the sum of the areas of the floor and the ceiling is equal to the sum of the areas of the four walls, the volume of the hall in $\mathrm{cu} \mathrm{m}$ is

The volume of a cube is $1000 {\mathrm{cm}}^3$. Find its side.