Mot thung ko nap co dang HLP co canh 7,5m.Nguoi ta quet son bo mat trong va ngoai cua thung do.Tinh DT quet son.

1 nguoi thue son mat trong va mat ngoai mot cai thung sat khong co nap dang hlp canh 1.2m 

a tinh dien tich can phai son 

b nguoi ay phai tra bao nhieu tien biet rang tien son moi m2 la 30000dong

mot cai thung khong nap dang hinh lap phuong co canh 7,5dm. Nguoi ta quet son toan bo mat trong va ngoai cua thung do. Tinh dien tich quet son ?The tich cua thung?

Mot nguoi tho nhan son mat trong va mat ngoai cua mot thung hang hinh lap phuong canh 1,6m Tinh dien tich be mat thung nguoi ay phai son

mot cai thung honh hop chu nhat co chieu dai 2,5m chieurong 1,5m chieu cao 1,2m nguoi ta dung son quet vao cac mat xung quanh va hai mat day cua thung (chi son mat ngoai)hoi dien tich can quet son la bao nhieu

nguoi ta xep cac hinh lap phuong nho co canh 1cm thanh mot hinh lap phuong lon co dien tich toan phan la216cm2 sau do nguoi ta son tat ca cac mat cua khoi lon do .Hoi co baonhieu hinh lap phuong nho duoc son 3 mat;2mat 1 mat va ko duoc son mat nao 

TRA LOI GIUP MINH NHE

Mot cai thung khong nap dang hinh hop chu nhat co chieu dai 3 m chieu rong 1.2 m va chieu cao 16 dm . Nguoi ta son tat ca cac  mat trong cua thung . Tinh dien tich duoc quet son cua thung biet do dai day cau thung khong dang ke

nguoi ta xep tam bia hinh lap phuong nho co canh 4cm thanh mot hinh lap phoung lon hon roi son tat ca cac mat cua hinh lap phoung lon hoi moi hinh lap phoung nho co may mat duoc son va dien tich duoc  son cua moi hinh lap phuong nho la bao nhieu

nguoi ta xep nhung HLP nho canh 1 cm thanh mot HLP lon co canh 9 cm . sau do nguoi ta son cac mat ngoai cua HLP lon vua xep duoc . hoi co bao nhieu HLP nho duoc son 3 mat , 2 mat