Question (25/28)
A water tank is two-fifth full. Pipe A can fill a tank in 10 minutes and pipe B can empty it in 6 minutes. If both the pipes are open, how long it will take to empty or fill the tank completely ?(A) 6 minutes to empty
(B) 6 minutes to fill
(C) 9 minutes to empty
(D) 9 minutes to fill
Question (26/28)
A tap can fill a tank in 6 hours. After half the tank is filled, 3 more similar taps are opened. What is the total time taken to fill the tank completely ?(A) 3 Hrs 15 Min
(B) 3 Hrs 30 Min
(C) 3 Hrs 45 Min
(D) 4 Hrs 00 Min