Question (15/28)
A tank is filled by three pipes with uniform flow. The first two pipes operating simultaneously fill the tank in same time during which the tank is filled by the third pipe alone. The second pipe fills the tank 5 hours faster than the first pipe and 4 hours slower than the third pipe. What is time required by the first pipe alone to fill the tank?(A) 6 Hours
(B) 10 Hours
(C) 15 Hours
(D) 20 Hours
Question (16/28)
A tank is filled in 5 hours by three pipes A, B and C. The pipe C is twice as fast as pipe B and pipe B is twice as fast as pipe A. How much time will pipe A alone take to fill the same tank ?(A) 20 Hours
(B) 25 Hours
(C) 30 hours
(D) 35 Hours