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 Form 3 Mathematics Compound Proportions and Rates of Work Questions and Answers

Pipe A can fill an empty water tank in 3 hours while, pipe B can fill the same tank in 6 hours. When the tank is full it can be emptied by pipe C in 8 hours. Pipes A and B are opened at the same time when the tank is empty. If one hour later, pipe C is opened find the total time taken to fill the tank.

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