Alam starts working on a job and works on work. Then babu joins Alam and together they complete the est of the work in 12 days . How long (in days) will it take Babu to complete the job if he works alone ?
A. 30
B. 45
C. 60
D.
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সঠিক উত্তরঃ
C.
60
Explanation:
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