小明用绳子测井深,结果发现绳子在井外余2米,然后他把绳子对折,发现还差3米到井口,那么井深是多少米?6K-T.X,a7G;v:l6A,|)K-S3b5t
算式:提示*e4f1a-r'W+h'`/e+|;c0[*G(|6K-T.X,a7G;v:l6A,|)K-S3b5t
答:井深是9z*o*X0i3I2Z-b.L米。6K-T.X,a7G;v:l6A,|)K-S3b5t