Question
A tank is filled with three pipes A, B, and
A tank is filled with three pipes A, B, and
C. Pipe A takes 18 hr. to fill 60% of the tank and Pipe B takes 8 hr. to fill 40% of the tank. Pipe A and Pipe C together fill 75% of the tank in 7.5hr. hr. Find the ratio of time taken to fill the tank by pipe A and B together to pipe B and pipe C together.
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