Answer:
The height of the tree is 39 ft 
Explanation:
Ht= Height of tree
St= Shadow of tree
Hp= Height of person
Sp= Shadow of person
Ht=Hp
St Sp
?ft = 6 ft
22.75 ft 3.5 ft
Multiply 22.75 ft by 22.75 ft and also divide 22.75 ft by 3.5 to get 
6 ft* 6.5 
? ft = 39 ft