Răspuns :
20m.............6 zile
30m..............x zile
20\30=x6
30x=20×6
30x=120
x=120:30
x=4 zile
30m..............x zile
20\30=x6
30x=20×6
30x=120
x=120:30
x=4 zile
nr. muncitori si nr. de zile = nr.invers proportionale :
20·6 = 30·x x = 120/30 = 4 zile
20·6 = 30·x x = 120/30 = 4 zile