Multiple choice

P can do a work in 6 hours. Q can do the same work in 8 hours, while R can do the same work in 10 hours. If they work together, then in how many hours will they finish the work?

  1. 2 hours

  2. 4 hours

  3. 3 hours

  4. 5 hours

  5. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Number of hours taken by P, Q and R to finish the work = 120/47 = 2.55 = 3 hours

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