Multiple choice

Directions: Study the given information carefully and answer the question that follows. Sachin takes up a project to be completed in 20 days. It requires 5 men to work continuously through all the days. Before commencement of the project, Mr. Virat, Sachin's client, informs him that he wants the project to be completed ahead of the given time. So, Sachin figures he will have to increase 5 men every 2 days to meet Mr. Virat's condition. On the day of completion of project (the day specified by Mr. Virat), how many men would be working?

  1. 24

  2. 20

  3. 36

  4. 18

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

The project requires 5 men for 20 days (100 man-days). Sachin increases 5 men every 2 days. The sequence of men is 5, 5, 10, 10, 15, 15, 20, 20, 25, 25. The total man-days sum to 125, which exceeds 100. The project finishes when the cumulative sum reaches 100, which occurs during the 16th day, where 20 men are working.

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