1 . If A and B together can complete a piece of work in 15 days and B alone in 20 days, in how many days can A alone complete the work?
- A. 60
- B. 45
- C. 40
- D. 30
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সমন্বিত পাঁচ ব্যাংক || অফিসার ক্যাশ - 06.11.2021
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