Amio working alone ,can finish a certain job in 10 days and Sumio working alone can finish the same job in 15 days. If Amio and Somio are working together how many days do they need to finish the job?
A. 25 days
B. 12.5 days
C. 6 days
D. 8 days
সঠিক উত্তরঃ
C.
6 days
Explanation:
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