Răspuns :
V= Ab x h= 20 x 20 x 10
V= 4000 cm cubi= 4 dm cubi
At= 2 Ab + 4ah
At= 2 x 400 + 4 x 20 x 10
At= 800+ 800
At= 1600
110 supra 100 din 1600= 110 x 1600 : 100= 110 x 16= 1760 cm
V= 4000 cm cubi= 4 dm cubi
At= 2 Ab + 4ah
At= 2 x 400 + 4 x 20 x 10
At= 800+ 800
At= 1600
110 supra 100 din 1600= 110 x 1600 : 100= 110 x 16= 1760 cm
a)V=Ab*h
Ab=l^2=20^2=400
V=400*10=4000
b)At=Al+2Ab
Al=Pb*h
Pb=4l
Pb=4*20=80
Al=80*10=800
At=800+2*400
At=800+800=1600
A carton=110/100*1600=1760