mot san choi hinh chu nhat co chieu rong 36m va chieu dai gap 5 lan chieu rong. Nguoi ta dung loai gach cu moi met vuong can 4 vien gach de lat san choi do. Hoi can it nhat bao nhieu chuyen xe de cho du gach lat san choi tren? Biet rang moi chuyen xe cho 350 vien gach va coi dien tich cac mach vua khong dang ke.
De lat nen mot lop hoc hinh chu nhat nguoi ta dung cac vien gach bong hinh vuong co canh dai 20 cm. Biet chu vi nen la 36m , chieu dai hon chieu rong 4 m . Tinh so gach bong can dung de lat nen (coi dien tich mach vua la khong dang ke)
nguoi ta dung 400 vien gach vuong moi cach 30cm de lat mot can phong hinh chu nhat co chieu rong la 4m .Tinh chieu dai can phong , biet dien tich cac mach vua khong dang ke?
Mot nen nha hinh chu nhat co chieu dai 15 m , chieu rong 6 m .
a, Tinh dien tich nen nha do ?
b, Tinh so vien gach hoa hinh vuong can dung de lat nen nha do , biet rang canh cua moi vien gach la 30 cm va gach vua khong dang ke ?
de lat nen mot phong hoc hinh chu nhat,nguoi ta da dung loai gach men hinh vuong co cach 20cm.hoi can bao nhieu vien gach de lat kin phong hoc do,biet rang nen phong hoc co chieu rong 5m,chieu dai 8m va phan gach vua khong dang ke ?
de latnen 1 phong hoc hcn co cheu dai 8m va chieu rong 6m nguoi ta dung loai gach men hinh vuong co canh dai 40 cm. hoi can bao nhieu vien gach de lat kin phong hoc do , biet rang phan mach vua khong dang ke
mot truong tieu hoc muon lat lai nen cac phong hoc . nguoi ta tinh rang co 7 phong hoc can lat lai nen , moi phong deu co dien tich nen la 40 m2 va chi dung toan loai gach vuong co do dai moi canh la 40 cm . hoi can it nhat bao nhieu vien gach hoa cung loai thi lat du cac phong hoc da du dinh coi dien tich mach vua khong dang ke
de lac nen mot phong hoc hinh chu nhat , nguoi ta dung loai gach men hinh vuong co canh 20cm . hoi can bao nhieu vien gach de lac kin nen phong hoc co chieu rong 5m , chieu dai 8m va phan mach vua khong dang ke?
nen cua mot hoi truong hinh chu nhat co chieu dai hon chieu rong 8m va chieu rong bang 3/5 chieu dai nguoi ta lat nen hoi truong do bang gach men moi met vuong gach gia 350 000 dong hoi can bao nhieu tien de mua gach men de lat kin nen hoi truong do
