数学兴趣小组的同学用绳子测井深，把绳子3折来测，则井外余1米；把绳子5折来测，则绳子离井口还差1米，井深多少米？绳长多少米？2F)O,p4g8_;?
算式：提示'o2f+o:A2n;a(E4[2F)O,p4g8_;?
答：井深-l'Q:k5c1|8^'D米，绳长4X6r8]*p(d'x,k,K)Y+J*w:C1K米．2F)O,p4g8_;?