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Postal or Sorting Assistants Model Paper 2 With Solutions

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Question : 13

Total: 100

Pipes A and B can fill a tank in 6 and 5 hours, respectively. Pipe C can empty it in 15 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
1
2
3
h
3h
2
1
2
h

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