Jawabanmu

2014-03-04T10:01:02+07:00
Orang hari 15 20 25 x jwb: 25/15 = 20/x 25x = 15x20 x =300:25 =12
2014-03-04T10:20:04+07:00
15 = 20
25 = x
15/25 = x/20
25 x = 15x20
25 x =300
x=12
jadi pekerjaan selesi dalam 12 hri