hieu cua 2 so la 735 neu bot o so be di 18 don vi thi so be bang 5/8 so lon . tim hai so ban dau

mot thua ruong hinh thang co day lon  62,5,day be bang 2/5 day lon .nguoi ta mo rong thu ruong bang cac keo dai day be them 12,4m va day lon them 8 m nen dien tich thua ruong tang them 367.2.tinh dien tich thua ruong hinh thang ban dau 

mot thua ruong hinh thang co day lon la 62,5 m,day be bang 2/5 day lon.nguoi ta mo rong thua ruong hinh thang bang cach keo dai day be them 12,4 m.day lon them 8 m nen dien tich thua ruong  tang them 367,2 m vuong.hoi dien tich ban dau cua thua ruong la?

loi giai phep tinh

tong cua hai so la 64 ,8 sau khi them so thu lon1,7 don vi va bot so be di 1,7 don vi thi so be bang 3/5 so lon. tim hai so ban dau

Hieu cua 2 so la 38,4 .Khi them vao so lon 4,2 va them vao so be 1,4 thi  so be bang 5/7 so lon .Tim hai so luc ban dau

Mot thua ruong hinh thang co day lon 62.5m,day be bang 2/5 day lon. Nguoi tamo rong thua ruong bang cach keo dai day be them12.4m va day lon them 8m nen dien tich thua ruong tang them 367.2m. Tinh dien tich thua ruong hinh thang ban dau

Dien dau lon, dau be, dau bang

15/13.....15/14           24/36.....36/48      8/9......17/18           134/140..... 166/100

   11/18.....7/12

Cho mot thua ruong hinh thang co day lon 62,5m,day be bang 2/5 day lon.Nguoi ta mo rong thua ruong bang cach keo dai day be them 12,4m va day lon them 8m nen dien tich thua ruong tang them 367,2m2.Tinh dien tich thua ruong hinh thang luc dau?

hieu cua hai so la175 neu so be tang 13 don vi va giu nguyen so lon thi so lon  bang 3/5 so be moi tim so be ban dau