Multiple choice

A piece of work can be completed by Bikesh alone in 24 days. If his brother, Atul, is 60% more efficient than him, then in how many days will the same work be completed by Atul alone?

  1. 12 days

  2. 15 days

  3. 17 days

  4. 18 days

  5. 20 days
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Bikesh takes 24 days. Atul is 60% more efficient, meaning his efficiency is 1.6 times Bikesh's. Time taken by Atul = 24 / 1.6 = 15 days.

AI explanation

Using the inverse efficiency formula, Days = Base Days / Efficiency Ratio. Atul's efficiency is 1.6 times Bikesh's efficiency, so the efficiency ratio is 1:1.6 or 5:8. Atul takes 24 x (5/8) = 15 days to finish the work.

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