Question
The average height of a durian tree, a starfruit tree and a coconut tree is 5.6 m. The coconut tree is four times as tall as the starfruit tree and 1.2 m taller than the durian tree. Find the average height of the durian tree and the starfruit tree.
2 m

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The average height of a durian tree, a starfruit tree and a coconut tree is 5.6 m. The coconut tree is four times as tall as the starfruit tree and 1.2 m taller than the durian tree. Find the average height of the durian tree and the starfruit tree.