How many square tiles of side $8 \mathrm{cm}$ will be required to tile a floor of dimensions $250 \mathrm{cm}$ by $90 \mathrm{cm}$?

Whose volume is greater- a cube whose edge is $8 \mathrm{m}$ or a cuboid whose length, breadth and height are $6.5 \mathrm{m}, 2.4 \mathrm{m}$ and $5 \mathrm{m}$, respectively?

Find the area of the shaded quadrilateral?