October 2018 2 61 Report
Kakak, tolong bantuannya (:
Tuti dapat menyelesaikan pekerjaannya selama 20 hari. Andri dapat mengerjakan pekerjaan tsb selama 30 hari. Jika Andri &Tuti bekerja sama, kapan pekerjaan tsb selesai?
A. 12 hari
B. 25 hari
C. 10 hari
D. 50 hari

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