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
mot can phong co chieu dai 6m , chieu rong 4m . Nguoi ta lat nen can phong , vien gach co hinh vuong canh 40cm va co gia 1 vien la 2000 dong . Hoi can phong do can bao nhieu vien gach va mat bao nhieu tien de mua so gach do ?
mot nen nha hinh chu nhat co chieu dai hon chieu rong 18m, chieu rong bang 2/5 chieu dai, hoi can bao nhieu vien gach hinh vuong canh 3dm de lat du nen nha
1 nen nha hinh chu nhat co chieu dai 9m chieu rong 6m hoi can bao nhieu vien gach men hinh vuong canh 30cm de lat kin nen nha do
Mot nen nha hinh chu nhat co chu vi la 60m, chieu rong bang 2/3 chieu dai, nguoi ta lat nen bang nhung vien gach hinh vuong canh 2dm.hoi can bao nhieu gach de lat kin nen nha do
bai 7 : 1 nen nha hinh chu nhat co tong do dai hai canh lien tiep la 11 m, chieu rong kem chieu dai 3 m . Hoi
a)tinh dien tich nen nha
b) nguoi ta lat bang gach men hinh vuong canh la 40 cm. Hoi phai dung bao nhieu vien gach de lat kin nen nha ( coi mach vua la khong dang ke)
mot nen nha hinh chu nhat co tong do dai hai canh lien tiep la 11m chieu rong kem chieu dai 3m
a) tinh dien tich nen nha
b) nguoi ta lat nha bang gach n]men hinh vuong canh 40 cm hoi phai dung bao nhieu vien gach de lat kin nen nha ( coi manh vua la ko 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?
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 ?