dien h la
8*8=64(m2)
chieu rong mot manh la
80*20=1600 (cm2)
can so vien la
doi 64m=640000cm2
640000:1600= 400 vien
ket ban de minh gioi lam
dien h la
8*8=64(m2)
chieu rong mot manh la
80*20=1600 (cm2)
can so vien la
doi 64m=640000cm2
640000:1600= 400 vien
ket ban de minh gioi lam
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 ?
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
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
nen cu amot 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 mat vuong gach gia tri 350000 dong. hoi can bao nhieu tien mua gach de lat kin nen hoi phong
de lat nen 1 can phong nguoi ta da su dung het 300 thanh go hinh chu nhat co chieu rong 20 cm,chieu dai 50cm .hoi dien tich nen can phong do la bao nhieu met vuong ?
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?
Mot phong hoc hinh chu nhat co tong do dai hai canh lien tiep lef 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 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 )