Question

[Le Thi Xuan Quynh]

Nguoi ta quet voi mot can phong hinh hop chu nhat co chieu dai la 8m, chieu rong 3,5m va chieu cao 2,75m.Tinh dien tich xung quanh can quet voi cua can phong ?(Biet tong dien tich cua cac canh cua la 6m2)

Answer 1

[princess of the ice barrie]

ket qua : 98,2m2

bai giai : 

dien h 4 buc tuong la : 

[6+4,5]x2x3,8=79,8 [m2]

dien h tran nha la :

6x4,5=27 [ m2]

dien h quet voi la :

79,8+27-8,6=98,2 [m2]

dap so : 98,2m2

Answer 2

[Le Thi Xuan Quynh]

thank ban nhiu lam