সকল সরকারী/বেসরকারী পরীক্ষার প্রশ্ন পেতে ক্লিক করুন গণিতের আইকিউ টেস্ট করতে ক্লিক করুন 
Two pipes A & B would be fill a tank in 20 & 30 minutes respectively. Both pipes being oppen, find when A must be turned off so that the tank may be just filled in 15 minutes.
Two pipes A & B would be fill a tank in 20 & 30 minutes respectively. Both pipes being oppen, find when A must be turned off so that the tank may be just filled in 15 minutes.
- ক. After 10 minutes
- খ. After 20 minutes
- গ. After 15 minutes
- ঘ. None
সঠিক উত্তরঃ After 10 minutes
এ সম্পর্কিত আরো প্রশ্ন দেখুন
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