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Q37. A cistern has three pipes A, B and C. Pipes A and B can fill it in 3 h and 4 h, respectively, while pipe C can empty the completely filled cistern in 1 h. If the pipes are opened in order at 3 pm, 4 pm, and 5 pm, respectively, at what time will the cistern be empty?

Answer»

Q37. A cistern has three pipes A, B and C. Pipes A and B can fill it in 3 h and 4 h, respectively, while pipe C can empty the completely filled cistern in 1 h. If the pipes are opened in order at 3 pm, 4 pm, and 5 pm, respectively, at what time will the cistern be empty?




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