Answer:
28 days
Explanation:
Day 1 = 3 m, day 1 end = 3 - 1 = 2 m
Day 2 end = 2 + 3 -2 = 3m
Day3 end = 3 + 3- 2 = 3 +1 = 4m
On 27th day end = 26+ 3 - 2 = 27 m
On 28th day =27 + 3 = 30 m
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