সকল সরকারী/বেসরকারী পরীক্ষার প্রশ্ন পেতে ক্লিক করুন গণিতের আইকিউ টেস্ট করতে ক্লিক করুন 
A cistern can be filled in 10 hours but it takes 12 hours due to a leak in its bottom. If the cistern is full, then the time that the leak will take to empty it is:
A cistern can be filled in 10 hours but it takes 12 hours due to a leak in its bottom. If the cistern is full, then the time that the leak will take to empty it is:
- ক. 60 min
- খ. 80 h
- গ. 90 h
- ঘ. 60 h
সঠিক উত্তরঃ 60 h
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