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      Question

      A firm assigned 10 technicians to complete an assignment in

      30 days. After 12 days of work, 4 technicians were moved to another location. What is the extension in the deadline?
      A 15 days Correct Answer Incorrect Answer
      B 14 days Correct Answer Incorrect Answer
      C 12 days Correct Answer Incorrect Answer
      D 19 days Correct Answer Incorrect Answer

      Solution

      ATQ,

      Let efficiency of each technician = 'e' units/day

      Total work = 10 × 30 × e = 300e units

      Work done in 12 days = 10 × 12 × e = 120e units

      Remaining work = 300e - 120e = 180e units

      Remaining technicians = 10 - 4 = 6

      Time needed = 180e ÷ (6 × e) = 30 days

      Extra days = 30 - 18 = 12 days

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