a boy noticed that the end of the 3.5m shadow, the top of his head and the top of a 28m tall tree are in a straight line. if he is 1.5m tall, how far is he from the tree?
using similar triangles, if he is x meters from the tree,
(x+3.5)/28 = 3.5/1.5
(x+3.5)/28 = 3.5/1.5