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140 30
100 30
75 x
100/75=x/30
x=100x30/75
= 3000/75
= 40
tambahan pekerja=40-30= 10
*jadi tambahan pekerja yg dibutuhkan 10 orang lagi
75 hari= 16 pekerja
maka tambahan sebanyak 46 pekeja