If 4 taps can fill a tank in 10 hours. Then how many hours can 6 taps fill the same tank

  • 6 2/3 hours
  • 2 2/5 hours
  • 6 3/2 hours
  • 15 hour
If 4 taps can fill a tank in 10 hours. Then how many hours can 6 taps fill the same tank
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