Mot cai be dang hnh hop chu nhat co chieu dai 80cm ,chieu rong 50cm, chieu cao 40cm,Hoi A)can do them bao nhieu lit nuoc de co nua be nuoc,B)khi chua nua be nuoc nguoi ta tha 1 vien gach co kich thuoc chieu dai 20cm, cjieu rong 10cm, chieu cao 5cm,vao be nuoc thi nuoc trong be dang cao bao nhieu cm