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Postal or Sorting Assistants Model Paper 3 With Solutions

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Question : 1

Total: 100

Pipes A and B can fill a tank in 5 and 6 hours, respectively. Pipe C can empty it in 12 hours. The tank is half full. All the three pipes are in operation simultaneously. After how much time, the tank will be full ?

3
9
17
h
11h
28
11
h
1
13
17
h

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