用绳测井深,把绳三折,井外余2米,把绳四折,还差1米不到井口,那么井深多少米?井长多少米?
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![用绳测井深,把绳三折,井外余2米,把绳四折,还差1米不到井口,那么井深多少米?井长多少米?](/uploads/image/z/10786977-9-7.jpg?t=%E7%94%A8%E7%BB%B3%E6%B5%8B%E4%BA%95%E6%B7%B1%2C%E6%8A%8A%E7%BB%B3%E4%B8%89%E6%8A%98%2C%E4%BA%95%E5%A4%96%E4%BD%992%E7%B1%B3%2C%E6%8A%8A%E7%BB%B3%E5%9B%9B%E6%8A%98%2C%E8%BF%98%E5%B7%AE1%E7%B1%B3%E4%B8%8D%E5%88%B0%E4%BA%95%E5%8F%A3%2C%E9%82%A3%E4%B9%88%E4%BA%95%E6%B7%B1%E5%A4%9A%E5%B0%91%E7%B1%B3%3F%E4%BA%95%E9%95%BF%E5%A4%9A%E5%B0%91%E7%B1%B3%3F)
用绳测井深,把绳三折,井外余2米,把绳四折,还差1米不到井口,那么井深多少米?井长多少米?
用绳测井深,把绳三折,井外余2米,把绳四折,还差1米不到井口,那么井深多少米?井长多少米?
用绳测井深,把绳三折,井外余2米,把绳四折,还差1米不到井口,那么井深多少米?井长多少米?
设绳长为x
x/3-2=x/4+1
x/3-x/4=3
x/12=3
x=36
36/3-2=12-2=10
井深10米,绳长36米
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