nhan dip sinh nhat huong , lan du dinh lam mot chiec hop dung qua hinh hop chu nhat co the tich la 12 dm khoi tuy nhien sau khi tinh toan thay chiec hop du dinh lam khong dung duoc mon qua da chuan bi nen la da tang chieu dai va chieu cao cua chiec hop len 2 lan . Tính the tich chiec hop lan da lam
mot thung dang hinh hop chu nhat khong nap co co chieu dai,chieu rong va chieu cao lan luot la 5dm;4dm;3dm.Tinh dien tich ton dung de lam chiec thung do.[phan mep ham khong dang ke]
bai 1 . nguoi ta tha 2 hon da co the tich nhu nhau vao mot be nuoc lam nuoc trong be dang them 1,2 dm . biet chieu dai be la 60 cm , chieu rong cua be la 35 cm , hay tinh the tich moi hon da .
bai 2 . hai chiec hop co the tich la 345 cm khoi . the tich hop thu nhat lon hon the tich hop thu hai 25 cm khoi . tinh the tich moi hop.
bai 3 . mot hinh lap phuong co the tich 64 dm khoi . tinh dien tich toan phan cua hinh lap phuong do .
bai 1 . nguoi ta tha 2 hon da co the tich nhu nhau vao mot be nuoc lam nuoc trong be dang them 1,2 dm . biet chieu dai be la 60 cm , chieu rong cua be la 35 cm , hay tinh the tich moi hon da .
bai 2 . hai chiec hop co the tich la 345 cm khoi . the tich hop thu nhat lon hon the tich hop thu hai 25 cm khoi . tinh the tich moi hop.
bai 3 . mot hinh lap phuong co the tich 64 dm khoi . tinh dien tich toan phan cua hinh lap phuong do .
de dan mot cai hop bang bia khong co nap dang hinh hop chu nhat co chieudai 80cm , chieu rong 5dm va chieu cao 3dm. tinh dien tich bia de lam chiec hop do (khong tinh mep ban)
mot thung dang hinh hop chu nhat khong nap co chieu dai , chieu rong va chieu cao lan luot la5dm,4dm,3dm.tinh dien tich ton de lam chiec thung do.(phan mep han khong dang ke)
giai ro ra cho mk nhe
ai dung va nhanh nhat thi mik tick nha
1 hinh hop chu nhat co the tich la 120 m3 , neu gap chieu dai len 3 lan , chieu rong len 2 lan va giu nguyen chieu cao thi the tich cua hinh hop chu nhat la bao nhieu cm3 ?
mot hoc sinh lam mot cai hop bang bia cung co dang hinh hop chu nhat co chieu dai 40cm ,chieu rong 26cm va chieu cao 12cm .tinh dien tich tam bia dunng de lam hop < khonh tinh mep dan >
mot cai thung khong co nap dang hinh hop chu nhat co chieu dai 40dm,chieu rong 3m va chieu cao 6,5m.tinh dien tich ton de lam chiec thung do biet rang dien tich cac mep han bang 4%dien tich day thung