A

Admin • 828.43K Points
Coach

Q. Pipe A can fill a tank in 7 hours and pipe B can empty it in 14 hours. If both are opened together, the tank will be filled in?

  • (A) 7 hours
  • (B) 10.5 hours
  • (C) 14 hours
  • (D) 21 hours
Explanation by: Admin
Net rate = 1/7 − 1/14 = 1/14.

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