A pipe can fill a tank in 4 hours, and another pipe can fill it in 6 hours. How much time will they take to fill the tank together?

A pipe can fill a tank in 4 hours, and another pipe can fill it in 6 hours. How much time will they take to fill the tank together?

  1. a) 40 hours
  2. b) 4.5 hours
  3. c) 2.4 hours
  4. d) 5 hours

From the BB Assistant Director (ICT) February 2025 – Written (DU) exam, question 33 of 55.

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