সব প্রশ্নে ফিরে যান
Math
A tap can fill a tank in 6 hours. After half the tank is filled, there more similar taps are opened. What is the total time taken to fill the tank completely ?
A) 3 hrs 15 min
B) 3 hrs 45 min
C) 4 hrs
সঠিক উত্তর
D) 4 hrs 15 min