Nửa chu vi thửa ruộng là:
\(112:2=56\left(m\right)\)
Chiều dài thửa ruộng là:
\(56:\left(3+5\right)\times5=35\left(m\right)\)
Chiều rộng thửa ruộng là:
\(56-35=21\left(m\right)\)
Diện tích thửa ruộng là:
\(35\times21=735\left(m^2\right)\)
Đáp số: \(735m^2\)
mot thua ruong hinh chu nhat co chieu rong bang 3/5 chieu dai neu chieu dai bot di 1/5 cua no thi va chieu rong tang them 1/3cua no ta dduoc mot thua ruong hinh vuong co dien tich lon hon dien tich hinh chu nhat ban dau la 36m2 tinh chu vi va dien tich thua ruong ban dau
mot hinh chu nhat co chieu rong bang 3/5 chieu dai neu chieu dai bot di 1/5 cua no va chieu rong tang them 1/3 cua no ta duoc thua ruong hinh vuong co dien tich lon hon dien tich hinh chu nhat ban dau la 36m2 tinh chu vi va dien tich thua ruong ban dau
1/Mot vuon hoa hinh hop chu nhat co chu vi la 128m,chieu rong bang 3phan5 chieu dai .Tinh dien tich hinh chu nhat .
2/Mot manh vuon hinh chu nhat co chu vi 228m, chieu rong 40m .o giua manh vuon , nguoi ta dao 1 cai ao hinh vuong canh 10m .Tinh dien tich phan dat con lai .
3/Mot thua ruong hinh thang co day lon la 69m,day be 2phan3 day lon va chieu cao bang 3 phan 4 tong do dai hai day.
a/Tinh dien tich thua ruong do
b/Trung binh 100m vuong thua ruong thu hoach duoc 70 kg thoc. Hoi ca thua ruong thu hoach duoc bao nhieu ki lo gam thoc .
4/Mot hinh hop chu nhat co chieu cao bang trung binh cong cua dai va rong .Dien tich xung quanh cua hinh hop la 2500m vuong .Chieu dai hon chieu rong 20 cm .Tinh the tich hinh hop .
mot thua ruong HCN co chieu dai la 5dm, chieu rong bang 45% chieu dai. Tinh dien tich thua ruong hinh chu nhat do ?
mot thua ruong ruong hinh chu nhat co chieu dai hon chieu rong 18m .biet 1phan9 chieu dai bang 1 phan 3 chieu rong tinh dien tich thua ruong do bang bao nhieu dam vuong
mot thua ruong hinh chu nhat co chieu rong bang 3\7 chieu dai va rong kem chieu dai 360m
a, tinh chu vi va dien tich cua thua ruong hinh chu nhat do .
b,Biet rang cu 1m2 thua ruong nguoi ta thu hoach duoc 7kg thoc. Hoi tren thua ruong do,nguoi ta thu hoach duoc bao nhieu ta thoc?
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Mot thua ruong hinh chu nhat co chieu dai 54 m co dien tich bang dien tich cua mot thua ruong hinh Vuong co canh la 45 m Tình chu vi thua ruong hinh chu nhat
Mot thua ruong hinh chu nhat co chu vi la 0,2 km. Biet 2 lan chieu dai bang 3 lan chieu rong . Tinh dien tich hinh chu nhat do voi don vi la met vuong?
mot thua ruong hcn co chieu dai bang 5/3 chieu rong. neu tang chieu dai them 8m va giam chieu rong di 8 m thi dien tich hinh chu nhat moi lon hon dien tich hcn cu la 192 m2.tinh chu vi hinh do
