查人人中国名人网魔术表演视频大全集:MATH!!!!!!!
来源：百度文库 编辑：查人人中国名人网 时间：2024/05/14 12:19:02
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