Co 2 thung dau,thung to chua 144 lit dau .thung nho chua dc 70 lit .Ca 2 thung dung nuoc nhung chua day.Neu do nuoc tu thung nho sang day thung to thi thung nho con 1 lit .Neu do tu thung to sang thung nho cho day thi nuoc trong thung con lai =75/100 luong nuoc luc dau .Hoi luc dau moi thung co b/n lit nuoc ?
giup mk voi ,giai ra nha