A

Admin • 825.56K Points
Coach

Q. Two pipes A and B can fill a tank in 15 and 20 hours respectively. How long will they take together?

  • (A) 6 hours
  • (B) 7 hours
  • (C) 8 hours
  • (D) 9 hours
Explanation by: Admin
1/15 + 1/20 = 7/60 → time = 60/7 ≈ 8 hours.

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