15 workers can finish a job in 12 days. They work for 4 days, after which 5 additional workers join the team. In how many days will all of them together complete the remaining job?
A. 4 days
B. 13.5 days
C. 8.8 days
D. 6 days
সঠিক উত্তরঃ
D.
6 days
Explanation:
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