Find the height of a cuboid whose volume is 900 cm³ and the base area is 90 cm².

Given: Base area of the cuboid = 90 cm².

             volume of the cuboid = 900 cm³.

we know that the volume of the cuboid = base area x height.

                                                                  height = $\frac{\mathrm{volume} \mathrm{of} \mathrm{the} \mathrm{cuboid}}{\mathrm{base} \mathrm{area}}$.

                                                                                = $\frac{900 {\mathrm{cm}}^3}{90 {\mathrm{cm}}^2}=10 \mathrm{cm}$.

Therefore, the height of a cuboid is 10 cm.