Question
A rectangular tank is filled with water to a height of 6 cm. Its rectangular base measures 25 cm by 16 cm. When 12 litres of water are poured into the tank, the water level rises to 45 of the height of the tank. Find the height of the tank.
3 m

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A rectangular tank is filled with water to a height of 6 cm. Its rectangular base measures 25 cm by 16 cm. When 12 litres of water are poured into the tank, the water level rises to 45 of the height of the tank. Find the height of the tank.