Question
The average height of a mango tree, a durian tree and a coconut tree is 4.4 m. The coconut tree is thrice as tall as the durian tree and 0.8 m taller than the mango tree. Find the average height of the mango tree and the durian tree.
2 m

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The average height of a mango tree, a durian tree and a coconut tree is 4.4 m. The coconut tree is thrice as tall as the durian tree and 0.8 m taller than the mango tree. Find the average height of the mango tree and the durian tree.