mot phong hoc hinh chu nhat co tong do dai hai canh lien tiep la 15m. Chieu dai hon chieu rong la 3m.Tinh dien tich can phong? De lat het can phong do nguoi ta phai dung het bao nhieu vien gach vuong co canh 30cm?
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 )
mot can phong hinh chu nhat co chieu dai la 12m, chieu rong bang 1\4 chieu dai. trong can phong do nguoi ta lat gach vuong canh 1\5 m. Hoi can bao nhieu vien gach de lat ?
De lat nen 1 phong hoc hinh chu nhat co chieu dai 15 m,chieu rong 6 m nguoi ta dung loai gach men hinh vuong canh 30 cm.Gia 1 vien gach la 2500 dong.Hoi can bao nhieu tien de lat kin phong hoc do?{khong tinh phan mach vua}
mot can phong hinh chu nhat co chieu dai 7 m chieu rong 6 m nguoi ta da lat gach men hinh vuong canh 1 m mot vien gach mua voi gia 70 . 000 dong . hoi lat het can phong phai tra het bao nhieu tien gach ?
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 phong hoc hinh chu nhat co chieu dai 12m ,chieu dong 9m .nguoi ta muon lat nen phong hoc do thi can it nhat bao nhieu vien gach men hinh vuong c0 canh 3 dm .biet dien tich phan mach vua la khong dang ke .
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 ?