Răspuns :
56 m stofa ....... 16 costume
x m stofa .......... 20 costume
_______________________
x = 56 : 16 × 20 = 3,5 × 20 = 70 m stofa ( pt 20 de costume )
56 m stofa ....... 16 costume
x m stofa .......... 20 costume
_______________________
x = 56 : 16 × 20 = 3,5 × 20 = 70 m stofa ( pt 20 de costume )