Mot be chua nuoc co dang hinh hop chu nhat,khong co nap.Cac kich thuoc do trong long be la : chieu dai 2m,chieu rong 1,5m,chieu cao 1m.Nguoi ta quet xi mang toan bo mat trong cua be,trung binh cu 1m2 het 2kg xi mang.
a)Tinh luong xi mang can dung de quet trong long be.
b)Khi muc nuoc trong be cao bang 80% chieu cao cua be thi trong be co bao nhieu lit nuoc?(1dm3=1lit)
i'll tick the first person answer this :)