প্রশ্ন ও উত্তর
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.
গণিত Pipe and Tank 07 Oct, 2020
প্রশ্ন 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.
সঠিক উত্তর
After 10 minutes
মন্তব্য
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