A

Admin • 825.56K Points
Coach

Q. Pipe A fills a tank in 6 hours, pipe B in 12 hours. After 3 hours, pipe A is closed. How long will pipe B take to fill the remaining tank?

  • (A) 2 hours
  • (B) 3 hours
  • (C) 4 hours
  • (D) 6 hours
Explanation by: Admin
Work done in 3 hrs = 3(1/6+1/12)=3/4. Remaining = 1/4 → B takes 3 hrs.

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