Mathematics sunshine assessment grade three

7.5 meters

Test and analysis: let the height of the tree be x meters, and at the same time, the equation can be solved according to the direct ratio between the height of the object and the length of the shadow.

Suppose the height of this tree is x meters.

The solution is x=7.5.

The height of this tree is 7.5 meters.

Comments: The key to solve this problem is to read the meaning of the question, find the equivalence relationship, list the equations correctly, and then solve them.

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