Question

Mot be nuoc dang chua luong nuoc bang 3/4 dung tich be.Nguoi ta mo mot voi nuoc chay vao be,moi gio chay duoc 1/8 be.Hoi sau do bao lau thi be day nuoc?

Answer 1

  Luong nuoc can chay vao de day be:

        1-\(\frac{3}{4}\)=\(\frac{1}{4}\)(be)

Thoi gian de be day nuoc

\(\frac{1}{4}\):\(\frac{1}{8}\)=2(gio)

DAP SO 2 GIO

Answer 2

So phan be con lai la:

1-3/4=1/4(be)

Thoi gian de nuoc day be la:

1/4:1/8=2(gio)

DS:2gio