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20 orang = x hari
Perbandingan berbalik nilai
25/20 = x/60
x = 60 x 25 : 20
x = 1500 : 20
x = 75 hari
Jadi, perkerjaan itu akan selesai selama 75 hari
waktu :60
pekerja 5 orang mengundurkan diri
=25-5
=20
60/x.22/25
=75 orang
maaf ya klo salah