nguoi ta son toan bo mat ben ngoai chiec thap ... hoi tang thu 20 co bao nhieu hinh lap phuong ko duoc son mat nao biet thap co 30 tang

Co mot khoi da trang hinh lap phuong duoc son den toan bo mat ngoai . Sau do nguoi ta xe thanh 125 khoi da nho bang nhau va cung mot hinh lap phuong. Nguoi ta nhan duoc bao nhieu khoi da nho ma :

a co 3 mat son den

b co 2 mat son den 

c co 1 mat son den

d khong son mat nao

nguoi ta xep cac hinh lap phuong nho co canh 1cm thanh mot khoi hinh lap phuong lon co canh 12 cm.Sau do nguoi ta son toan bo 6 mat cua khoi hinh lap phuong lon . Hoi :

a)co bao nheu hinh duoc son 3 mat

b)co bao nhieu hinh duoc son 2 mat ? 

c)co bao nhieu hinh duoc son 1 mat?

d)co bao nhieu hinh khong duoc son mat nao

Nguoi ta son mat ben trong va mat ben ngoai mot chiec thung hinh lap phuong khong co nap co canh 60 cm . Biet rng mot chiec thung son nang 1 kg son duoc 18 m² , tinh luong son can dung de son du chiec thung do

nguoi ta xep nhung hinh lap phuong nho canh 1cm thanh 1 hinh lap phuong lon canh dai 11dm ,sau do nguoi ta son 3 mat ngoai cua hinh lap phuong lon vua xep duoc .Hoi co bao nhieu hinh lap phuong nho duoc son 1mat, 2 mat ,3 mat  khong son mat nao

hinh ben duoc xep boi cac hinh lap phuong nho 

a> trong hinh ben co bao nhieu hinh lap phuong nho

b>nguoi ta quet son tat ca cac mat cua hinh ben hoi co bao nhieu hinh lap phuong nho khong son mat nao

nguoi ta xep 1331 hinh lap phuong nho canh 1 cm thanh 1 khoi hinh lap phuong lon nguoi ta son 6 mat .hoi có bao nhieu hinh lap phuong nho son 1 mat ,2 mat .3 mat ,khong son mat nao?

Nguoi ta son toan bo mat ngoai cua 1 cai thung ton co nap dang hinh hop chu nhat co chieu dai 8dm , chieu rong 5dm va chieu cao 4dm .Hoi dien tich duoc son bang bao nhieu dm vuong ?

nguoi ta son toan bo mat ngoai cua mot cai thung ton co ap dang hinh hop chu nhat co chieu dai 9dm,chieu rong 6dm,chieu cao 5dm.hoi dien tich duoc son bang bao nhieu de-xi-met vuong.