Day lon thua ruong la 30:2/3=45m
chieu cao thua ruong la 45x4/5=36cm
dien h thua ruong la (30+45)x36:2=1350cm2
doi 1350cm2=0,135m2
Mot thua ruong hinh thang vuong co day be bang chieu cao va bang mot nua day lon .Thua ruong do duoc mo rong thanh hinh chu nhat. Tinh dien tich hinh thang biet dien dien tich phan mo rong la 5dam2.
mot thua ruong hinh thang co chieu cao la 10m hieu cua 2 canh day la 22m.Nguoi ta mo rong thua ruong do thanh hinh chu nhat co chieu daibang canh day lon va chieu rong bang chieu cao .Dien tich duoc mo rong bang 1phan7 dien tich cu .phan dat mo mo rong them ve phia tay phai la 90m vuong .Tinh day lon cua thua ruong cu
Mot thua ruong hinh thang co do ai day nho la 15 m,day lon bang 160 % day nho.Chieu cao bang hieu giua day lon va day nho .Hoi:
a)Dien tich cua thua ruong do bang bao nhieu met vuong?
b)Khoi luong thoc thu duoc tren thua ruong do la bao nhieu ta,biet rang cu 10m2 thi thu duoc 12kg thoc ?
Bai 1 :Mot thua ruong hinh thangco trung binh cong hai day la 301,5 m . Neu tang day lon them 5,6 m thi dien tich thua ruong tang them 336 m2
a}tinh dien tich thua ruong hinh thang bang don vi dam2
b}Cu 300 m2 thu duoc 22,5 tan thoc . Tinh xem tren ca thua ruong thu hoach duoc bao nhieu kilogam thoc ?
Bai 2 : Mot hinh thang co dien tich 3780 m2 va chieu cao 45 m . Day be bang 3/5 day lon . Tinh moi day cua hinh thang ?
Bai 3:Mot khu ruong hinh thang co chieu cao 50 m . Day lon 145 m ; day be 95 m . Moi met vuong thu hoach duoc 1,74 kg thoc . Hoi nguoi ta thu hoach duoc bao nhieu tan thoc tren thua ruong ay ?
Bai 4: Mot hinh thang co chieu cao 34 dm . Day lon gap doi day be . Dien tich hinh thang bang dien tich 1 hinh chu nhat chieu dai 68 dm ; chieu rong 30 dm . Tinh do daii moi day hinh thang ?
Bai 5 : Mot hinh thang co day lon 60 cm ; day be 38 cm . Neu keo dai day lon them 20 cm va day be 12 cm ve cung mot phia thi dien tich se tang them 512 cm2 . Tinh dien tich hinh thang luc dau ?
Bai 6:Mot hinh thang vuong co dien tich 85 dm2 va hieu 2 day la 3 dm . Neu keo dai day lon them 4 dm nua thi dien tich tang them 20 dm2 . Tinh do dai moi day cua hinh thang vuong do ?
giai han ra nha minh cho moi bai 100 mk nha tong cong se la 600 mk do nha ! ai giai xong ket ban luon voi minh nha ! thanks!
mot thua ruong hinh thang co dien tich bang 34met vuong va bang dien tich hinh vuong biet chu vi hinh vuong la 64m va chieu cao la 2m . tinh do dai moi day biet day lon hon dy be 8m
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
1 thua ruong hinh thang co day lon 63 m , day be 5/7 day lon va bang 9/ 8 chieu cao . Nay do mo rong duong phai cat day lon di mot so met , vi vay thua ruong con lai van la hinh thang co dien tich la 1910 m vuong .hoi da cat day lon di bao nhieu met ?
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.
