Mot dam ruong hinh thang vuong day lon dai 120m,day be ngan hon day lon 40m,chieu cao bang 3/4 tong do dai hai day.
a.Tim dien tich dam ruong do.
b.Nguoi ta ngan dam ruong hinh thang ra mot hinh tam giac sao cho phan ruong con lai la mot hinh chu nhat.Tim dien tich phan tam giac duoc ngan ra.
c.nguoi ta trong hai thu lua khac nhau tren hai phan ruong nay,tong so lua thu hoach duoc la 3210kg.Lua thu duoc tren phan ruong tam giac chi bang 3/10 so lua thu duoc tren phan ruong hinh chu nhat.Hoi moi dam vuong ruong nao thu duoc nhieu lua hon va hon bao nhieu kg lua ?
mot thua ruong hinh thang co day lon dai 52m, day be bang 45% day lon. chieu cao bang trung binh cong cua hai day.
a. tinh dien tich cua thua ruong do.
b. nguoi ta cay lua tren thua ruong, trung binh cu 100 m vuong thu hoach duoc 70 kg thoc. hoi ca thua ruong thu hoach duoc bao nhieu ta thoc.
mot thua ruong hinh thang co day lon la 120m va bang 4/3 day be chieu cao bang 2/5 day lon tren thua ruong nguoi ta trong lua cu 100m thu hoach 65kg thoc hoi thua ruong do thu hoach duoc bao nhieu ta thoc
mot thua ruong hinh thang co dáy lon 28m,day be 18m va chieu cao hon day be 17m .Nguoi ta cay lua tren thua ruong do cu 100m2 thu hoach duoc 62kg thoc .tinh so kg thoc thu hoach duoc tren thua ruong do
mot thua ruong hinh thang co day lon 120m day be bang 2/3 day lon day be dai hon chieu cao 5m trung binh cu 100m2 thu hoach duoc 64,5kg thoc tinh sothoc thu hoach duoc tren thua ruong do
mot thua ruong hinh thang co day lon 120m, day be bang 2/3 day lon. day be dai hon chieu cao 5m. trung binh cu 100m2 thu hoach duoc 64,5kg thoc. tinh so ki-lo-gam thoc thu hoach duoc tren thua ruong do.
ai nhanh minh tk
bac hoa cay lua tren mot thua ruong hinh thang co day lon la 120m day nho bang 1/2 day lon va bang 4/5 chieu cao biet rang cu 100 met vuong thi thu duoc 70kg thoc. hoi thua ruong do bac hoa thu hoach duoc may tạ thoc
bac hoa cay lua tren mot thua ruong hinh thang co day lon la 120m day nho bang 1/2 day lon va bang 4/5 chieu cao biet rang cu 100 met vuong thi thu duoc 70kg thoc. hoi thua ruong do bac hoa thu hoach duoc may tạ thoc
Mot thua ruong hinh thang co day be bang 100 m,day lon bang 5/4 day be,chieu cao kem day be 20 m.Nguoi ta trong lua tren thua ruong do,trung binh cu 50 m2 thu hoach duoc 37,5kg thoc.Hoi tren ca thua ruong thu hoach duoc bao nhieu ta thoc?