Pipe A can completely fill a tank in 4 hours, pipe B can completely fill the same tank in 5 hours and pipe C can completely fill the same tank in 20 hours. If all the pipes are opened together, how much time (in hours) will they take to fill half of the same tank?

Subject: Mathematics | Topic: Arithmetic | Difficulty: MEDIUM

Options

1. (A) 4
2. (B) 2
3. (C) 3
4. (D) 1

Verified Answer

Option (D): 1

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