Multiple choice

A farmer can plough a field working 6 hr. per day in 18 days. The worker has to work how many hr. per day to finish the same work in 12 days?

  1. 7

  2. 9

  3. 11

  4. 13
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Total work = 6 hours/day × 18 days = 108 hours. To complete the same work in 12 days, daily hours needed = 108/12 = 9 hours per day. This is an inverse proportion problem - as days decrease, hours per day must increase proportionally.

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