For a batch of goods, a and B can complete 56% of this batch of goods in 6 days. If they are transported alone, it takes the same time for a to complete 13 and B to complete 12______ Day B: Yes______ Day

For a batch of goods, a and B can complete 56% of this batch of goods in 6 days. If they are transported alone, it takes the same time for a to complete 13 and B to complete 12______ Day B: Yes______ Day

A. The work efficiency ratio of B is: 13:12 = 2:3, the work efficiency of a is: 56 △ 6 × 23 + 2, = 536 × 25, = 118; the work efficiency of B is: 56 △ 6 × 33 + 2, = 536 × 35, = 112; when doing it alone, a needs: 1 △ 118 = 18 (days); B needs: 1 △ 112 = 12 (days); answer: when doing it alone, a needs 18 days to complete; B needs 12 days to complete