সব প্রশ্নে ফিরে যান
Math
A tap can fill a tank in 6 hours . After half the tank is filled another simila tap is opened. What is the total time taken to fill the tank completely?
A) 3 h 30 m
B) 3 h 45 m
C) 4 h30 m
সঠিক উত্তর
D) 4 h