A teacher works twice as fast as a student. If a student can complete 1/12th part of the work in a day, the number of days in which the teacher and the student can together finish the work is;

A teacher works twice as fast as a student. If a student can complete 1/12th part of the work in a day, the number of days in which the teacher and the student can together finish the work is;
1). 4 days
2). 6 days
3). 8 days
4). 10 days

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