1 . A machine can produce 10 units in 5 hours. Another machine can produce 5 units in 10 hours. Working together, how many units can they produce in 30 hours?

  • A. 50 units
  • B. 60 units
  • C. 70 units
  • D. 80 units
  • D. None
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পায়রা বন্দর কর্তৃপক্ষ (বিভিন্ন পদ) 06-11-2020
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