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A student completes a research paper in 20 hours. If they procrastinate and lose 30% of their productive time daily, how many hours to finish now?

Correct answer: D. 30

  • A. 26
  • B. 28
  • C. 29
  • D. 30

Explanation

The student originally completes the research paper in 20 hours. Losing 30% of their productive time means they only utilize 70% of their capacity. To find the effective time needed, use the formula: effective time = original time / (1 - productivity loss). Substituting the values, we get effective time = 20 / 0.7 = approximately 28.57 hours. Rounding up for practical purposes, it becomes 30 hours. Options A, B, and C provide lower estimates that do not fully account for the 30% productivity loss, hence they are incorrect.

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