Multiple choice general knowledge science & technology

A painting job can be completed by 6 painters in 36 days. If 18 more painters join the team 8 days after starting work on the job, then how many more days are required to complete the job?

  1. 12

  2. 3

  3. 5

  4. 7
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Total work = 6 × 36 = 216 painter-days. Work done in first 8 days: 6 × 8 = 48 painter-days. Remaining work = 216 - 48 = 168 painter-days. New team size = 6 + 18 = 24 painters. Days needed = 168/24 = 7 more days. Common mistake: calculating total days (8+7=15) instead of 'more days' required.

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