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Q: A and B can do a work in 4 hours and 12 hours respectively. A starts the work at 6 AM and they work alternately for one hour each. When will the work be completed?

  • 1
    4 days
  • 2
    5 days
  • 3
    6 days
  • 4
    7 days
  • Show Answer
  • Workspace

Answer : 3. "6 days"
Explanation :

Answer: C) 6 days Explanation: Work donee by A and B in the first two hours, working alternatively = First hour A + Second hour B = (1/4) + (1/12) = 1/3. Thus, the total time required to complete the work  = 2 (3) = 6 days

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