澳大利亚对中国免签吗:MATH!!!!!!!

来源：百度文库 编辑：中科新闻网 时间：2024/05/11 01:50:32
Sam is walking in a straight line towards a lamp post which is 8m high, When he is 12 meter away from the lamp post, his shadow is 4 meter in high. When he is 8 meter from the lamp post, what is the length of his shadow?

2m

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