Question 12
Example 8. A container is filled with water to a height of $12\text{ cm}$. A stone of volume $585\text{ cm}^3$ is dropped into it. Find the new height of the water if the tank has a square base of $15\text{ cm}$ length.
**Editorial input convention:** Assume full submersion, vertical walls and no overflow or water loss. Enter the new height in centimetres.
**Editorial input convention:** Assume full submersion, vertical walls and no overflow or water loss. Enter the new height in centimetres.