The riddle of the water tank or the tank issue is one of the content in the book " The nine chapters on mathematical art " one of the oldest books math China, dating back to the period of Zhou Dynasty.

Riddle:
We have a water tank of 48 m3 capacity with two filling pipes and drain .
The first filler pipe open one would take 12 hours to fill the tank .
The second filler pipe open only take six hours to fill the tank.
With fully fueled and the two filling lines closed , the discharge pipe would take eight hours to remove all the water and leave the empty tank.

Question:
If we start from the empty tank and open the three pipes how long it would take to fill the tank?

See the solution to the riddle
The passage contains a riddle about a water tank with specific details about the filling and draining rates of pipes, followed by a question asking how long it would take to fill the tank if all three pipes are open. The solution to the riddle is mentioned but not explicitly provided in the text.
single_question
Given a text passage, determine:
    1. If it contains a mathematical question (including word problems or calculations)
    2. If an answer to that mathematical question is provided in the text

First, describe the content structure you found in 1-2 sentences.

Then provide your analysis in the following format:
TYPE: <one of the following values>
- NO_QUESTION
- SINGLE_QUESTION
- SINGLE_QUESTION_WITH_ANSWER
- MULTIPLE_QUESTIONS
- MULTIPLE_QUESTIONS_WITH_ANSWERS
system
The riddle of the water tank or the tank issue is one of the content in the book " The nine chapters on mathematical art " one of the oldest books math China, dating back to the period of Zhou Dynasty.

Riddle:
We have a water tank of 48 m3 capacity with two filling pipes and drain .
The first filler pipe open one would take 12 hours to fill the tank .
The second filler pipe open only take six hours to fill the tank.
With fully fueled and the two filling lines closed , the discharge pipe would take eight hours to remove all the water and leave the empty tank.

Question:
If we start from the empty tank and open the three pipes how long it would take to fill the tank?

See the solution to the riddle
user
The passage contains a riddle about a water tank with specific details about the filling and draining rates of pipes, followed by a question asking how long it would take to fill the tank if all three pipes are open. The solution to the riddle is mentioned but not explicitly provided in the text.

TYPE: SINGLE_QUESTION