用一根绳测井深,将绳三折去量,井口外余三米;四折去量,余一米.井深几米?绳长几米?
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/19 08:49:07
用一根绳测井深,将绳三折去量,井口外余三米;四折去量,余一米.井深几米?绳长几米?
![用一根绳测井深,将绳三折去量,井口外余三米;四折去量,余一米.井深几米?绳长几米?](/uploads/image/z/16570531-19-1.jpg?t=%E7%94%A8%E4%B8%80%E6%A0%B9%E7%BB%B3%E6%B5%8B%E4%BA%95%E6%B7%B1%2C%E5%B0%86%E7%BB%B3%E4%B8%89%E6%8A%98%E5%8E%BB%E9%87%8F%2C%E4%BA%95%E5%8F%A3%E5%A4%96%E4%BD%99%E4%B8%89%E7%B1%B3%3B%E5%9B%9B%E6%8A%98%E5%8E%BB%E9%87%8F%2C%E4%BD%99%E4%B8%80%E7%B1%B3.%E4%BA%95%E6%B7%B1%E5%87%A0%E7%B1%B3%3F%E7%BB%B3%E9%95%BF%E5%87%A0%E7%B1%B3%3F)
设井深x米.
则3(x+3)=4(x+1)
=>3x+9=4x+4
x=5
3(x+3)=3*(5+3)=3*8=24米——绳长
则3(x+3)=4(x+1)
=>3x+9=4x+4
x=5
3(x+3)=3*(5+3)=3*8=24米——绳长
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