December 2018 1 8 Report
Mang Duman memerlukan waktu 3 jam utk membersihkan rumput di halaman. Mang Husen hanya memerlukan waktu 2 jam utk menyelesaikan pekerjaan tsb. Jika mereka berdua bekerja bersama membersihkan rumput di halaman yg sama, maka memerlukan waktu sebanyak....
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