সকল সরকারী/বেসরকারী পরীক্ষার প্রশ্ন পেতে ক্লিক করুন গণিতের আইকিউ টেস্ট করতে ক্লিক করুন 
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?
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?
- ক. (m + n)/mn
- খ. mn/(m + n)
- গ. m + n
- ঘ. 1/m + 1/n
সঠিক উত্তরঃ mn/(m + n)
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