Multiple choice

A group of 60 men can complete a piece of work in a certain number of days. If 10 more men join them, then the work can be completed in 8 days less. How many days will be required to complete the same work by 100 men?

  1. 32 1 5 days

  2. 33 3 5 days

  3. 34 5 7 days

  4. 36 6 7 days

  5. Cannot be determined
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Let the original completion time be d days. Since work is constant, 60d = 70(d - 8), giving d = 56. For 100 men, the required time is 60 × 56/100 = 33.6 days, or 33 3/5 days.

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