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A builder decided to construct a fly-over in 42 months. Initially he had employed 150 men, but after 25 months he realized that the deadline couldn't be met, and hence he employed 60 more men and completed the construction 2 months before the stipulated time. If he had not employed the additional men, how many months behind the schedule would the construction have been finished?
  • a)
    4 months
  • b)
    6 months
  • c)
    8 months
  • d)
    10 months
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
A builder decided to construct a fly-over in 42 months. Initially he ...
Actual work done is 150 men working for 25 months and (150 + 60) men working for 15 months (26th - 40th month)
Hence total work done (in man-months) = 150*25 + (150 + 60)*(40 - 25)
= 150*25 + 210*15
= 6900 man-months
To complete the work with initial strength of 150 men, time taken would be (6900/150) = 46 months.
But the scheduled finish for the construction was initially 42 months, hence the builder would have been (46 - 42) = 4 months behind schedule.
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A builder decided to construct a fly-over in 42 months. Initially he had employed 150 men, but after 25 months he realized that the deadline couldn't be met, and hence he employed 60 more men and completed the construction 2 months before the stipulated time. If he had not employed the additional men, how many months behind the schedule would the construction have been finished?a)4 monthsb)6 monthsc)8 monthsd)10 monthsCorrect answer is option 'A'. Can you explain this answer?
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