1 . 12 students working for 5 hours a day can solve a certain number of problems in 8 days. How many students are needed to solve. Five times the original number of problems, if they work at 4 hours a day for 15 days?
- A. 90
- B. 45
- C. 95
- D. 40
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জনতা ও রূপালী ব্যাংক- অফিসার ১৩.১২.২০১৯
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