প্রশ্ন ও উত্তর
One worker can do a job in n hours, while it takes a second worker m hours to do the same job. How long does it take both workers?
গণিত Time and Work 07 Oct, 2020
প্রশ্ন One worker can do a job in n hours, while it takes a second worker m hours to do the same job. How long does it take both workers?
সঠিক উত্তর
mn/(m + n)
মন্তব্য
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