Sam is walking in a straight line towards a lamp post which is 8m high.When he is 12m away from the lamp post,his shadow
问题描述：
Sam is walking in a straight line towards a lamp post which is 8m high.When he is 12m away from the lamp post,his shadow is 4m in length.When he is 8m from the lamp post,what is the length of his shadow?
答
The length of his shadow is 1.67m