BAI GIAI Sau khi ban 30 l dau trong hai thung ,so dau con lai la 730-30=700(l) ta co so do: thung thu nhat:3phan thung thu hai :7phan MINH CHI VIET THE NAY THOI CHU BAN PHAI VE SO DO RA! Thung thu nhat chua so dau la(hay so dau trong thung thu nhat la): 700:(3+7)x3=210(l) Thung thu hai chua so dau la: 700-210=490(l) Dap so: a:thung thu nhat:210(l)
b:thung thu hai:490(l)