A fish tank has a rectangular base measuring $90\text{cm}$ by $50\text{cm}$ and a height of $60\text{cm}$. It contains water filled to a height of $35\text{cm}$. A decorative stone, with a volume of $4500{\text{cm}}^3$, is fully submerged in the tank. What is the new height of the water in the tank, in centimeters?