Answer:
40 m
Step-by-step explanation:
Let the height of the tree be x meters.
Therefore, height of building = 5x
According to the given information:
Height of (building + tree) = 48 m
[tex]5x + x = 48 \\ \\ 6x = 48 \\ \\ x = \frac{48}{6} \\ \\ x = 8 \: \\ \\ 5x = 5 \times 8 \\ \\5x = 40 \: m \\ \\ height \: of \: building = 40 \: m[/tex]