Abhishek was given a piece of work to be done in 24 days. The lazy person that he was, he works at 75%, 50%, 80% and 25% of his usual rate on 1st, 2nd, 3rdand 4th days respectively. In how many days will he finish the remaning jo. If he works at his usual rate from the 5th day?
A:21.7
B:24
C:25
D:26.5
Answer: A
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