A

Admin • 828.70K Points
Coach

Q. Three pipes A, B and C can fill a tank in 12, 15 and 20 hours respectively. How long will they take together?

  • (A) 4 hours
  • (B) 5 hours
  • (C) 6 hours
  • (D) 7 hours
Explanation by: Admin
1/12 + 1/15 + 1/20 = 1/4.

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