Question
A rectangular container is filled with water to a height of 7 cm. Its rectangular base measures 30 cm by 12 cm. When 7.2 litres of water are poured into the container, the water level rises to 35 of the height of the container. Find the height of the container.
3 m

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A rectangular container is filled with water to a height of 7 cm. Its rectangular base measures 30 cm by 12 cm. When 7.2 litres of water are poured into the container, the water level rises to 35 of the height of the container. Find the height of the container.