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      Question

      A can complete a piece of work in 24 days. He worked for

      21 days and then B finished the remaining work in 6 days. In how many days can A and B finish the work together?
      A 12days Correct Answer Incorrect Answer
      B 15days Correct Answer Incorrect Answer
      C 16days Correct Answer Incorrect Answer
      D 18days Correct Answer Incorrect Answer

      Solution

      A can complete a piece of work in 24 days. A does the work in 24 days =1 A does the work in 1 day =1/24 A does the work in 21 days = (1/24) ×21=7/8 Remaining work =1-7/8 =1/8 Remaining work finished by B in 6 days =6×8=48days. A and B together finish the work – 2448 96 42 =96/4+2 =96/6 =16 days.

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