The following question is accompanied by three statements (I), (II), and (III). You have to determine which statements(s) is/are sufficient/necessary to answer the questions. Calculate the total time required to fill the tank. I. Pipe A fills the tank in 15 minutes. II. Pipe C takes twice as long as A. In one minute pipe B empties 1/12th of the tank. III. Pipe A, B, and C are opened together. Correct Answer Statement I, Statement II, and Statement III are sufficient to answer the Ques. From condition I & II: Given: Time taken by A to fill tank = 15 minutes Times taken by C to fill tank = twice as A = 30 minutes Pipe B empties 1/12th of the tank in 1 minute hence, pipe B empties the whole tank in 12 minutes Pipe A, B, and C are opened together. Calculation: Pipe Time (in min) Total Work = LCM (15, 8 and 30) Efficiency (No. of units filled in a min) A 15 120 ÷ 15 = 8 B 12 120 120 ÷ 12 = -10 C 30 120 ÷ 30 = 4 A+ B + C 120/12 = 10 min 8 - 10 + 14 = 12 Work done by all three pipes in a minute