Question
A rectangular tank is filled with water to a height of 5 cm. Its rectangular base measures 30 cm by 10 cm. When 12 litres of water are poured into the tank, the water level rises to 34 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 5 cm. Its rectangular base measures 30 cm by 10 cm. When 12 litres of water are poured into the tank, the water level rises to 34 of the height of the tank. Find the height of the tank.