Answer:
h = 17.5 m
Explanation:
We have 2 similar right triangles as models of the situation
one has legs with George's height and shadow
the other is the height h of the tree and length of it's shadow
the corresponding sides of the 2 triangles are in proportion, that is
=
( cross- multiply )
10h = 175 ( divide both sides by 10 )
h = 17.5 m