1.

Study the following graph and answer the given question.The graph shows the time (in minutes) taken by the pipes (A, B), (C, D), (E, F), (G, H), and (P, Q) to fill a tank.Two pipes P and Q are inlet pipes. If they are opened at alternate minutes and if pipe P is opened first, then in how many minutes will the tank be full?

A. 18 minutes
B. 30 minutes
C. 16 minutes
D. 20 minutes
Answer» E.


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