A tap can fill a tank in 30 minutes and another tap can fill the same tank in 60 minutes. lf both the taps are opened simultaneously when the tank is half empty, in how many minutes will the tank be full?

• ক 10 minutes ✅ সঠিক উত্তর
• খ 20 minutes
• গ 7 minutes
• ঘ 18 minutes
• 5 15 minutes