用绳测井深,2折来量还余3米,3折来量还余1.2米,那么井几米,绳几米
1个回答
设绳长X米、井高Y米,
则①(X-3)/2=Y ;②(X-1.2)/3=Y
所以,X=6.6;Y=1.8
答:绳长6.6米、井高1.8米.
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