Multiple choice

Three workers working all days can do a work in 10 days, but one of them having other employment can work only half time. In hou many days the work can be finished?

  1. 12 days

  2. 12.5 days

  3. 15 days

  4. 16 days
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Three full-time workers complete the work in 10 days, so total work = 3 × 10 = 30 worker-days. With one worker at half-time, effective workforce = 2 + 0.5 = 2.5 workers. Time needed = 30/2.5 = 12 days. This assumes constant work rates and that tasks can be divided among workers without coordination overhead.

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