Răspuns :
Aria unei fete =120*120cm patrati=14400 cm patrati
Aria care trebuie vopsita este: 14400*2 cm patrati = 28800 cm patrati
facem regual de 3..
45cm patrati .....3g
28800 cm patrati...x grame
x=28800*3/45 = 28800/15 = 1920 grame
Aria unei fete =120*120cm patrati=14400 cm patrati
Aria care trebuie vopsita este: 14400*2 cm patrati = 28800 cm patrati
facem regual de 3..
45cm patrati .....3g
28800 cm patrati...x grame
x=28800*3/45 = 28800/15 = 1920 grame