Răspuns :
5 munc..........18zile......8h/zi
9munc............x zile......10h/zi
18x8=144 h
5munc.......................144h
9munc........................z h
invers proportionalitate
5x144=9xz
z=720:9=80h
x=80h:10=8 zile
9munc............x zile......10h/zi
18x8=144 h
5munc.......................144h
9munc........................z h
invers proportionalitate
5x144=9xz
z=720:9=80h
x=80h:10=8 zile
5 muncit...........18 zile........8h/zi
9 muncit...........x zile.........10h/zi
x= 5 x18 x 8 / 9 x 10
x = 8 zile
( x inmultit, / supra)
9 muncit...........x zile.........10h/zi
x= 5 x18 x 8 / 9 x 10
x = 8 zile
( x inmultit, / supra)