A

Admin • 828.03K Points
Coach

Q. Pipe A can fill a tank in 10 hours while pipe B can empty it in 15 hours. If both are opened together, how long will it take to fill the tank?

  • (A) 20 hours
  • (B) 25 hours
  • (C) 30 hours
  • (D) No filling
Explanation by: Admin
Net rate = 1/10 − 1/15 = 1/30.

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