Multiple choice

After working for 6 days, Ashok finds that only 1/3 rd of the work has been done. He employs Ravi who is 60% as efficient as Ashok. How many days more would Ravi take to complete the work?

  1. 20 days

  2. 19 days

  3. 12 days

  4. 10 days
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A Correct answer
Explanation

Ashok does 1/3 work in 6 days, so he does 1/18 work per day. Ravi is 60% as efficient, so Ravi does 0.6 * (1/18) = 1/30 work per day. Remaining work is 2/3. Days for Ravi = (2/3) / (1/30) = 20 days.

AI explanation

Since Ashok completes 1/3 of the work in 6 days, his daily work rate is 1/18. The remaining work is 2/3 of the total job, and Ravi is 60 percent as efficient as Ashok, so Ravi's daily work rate is 0.6 divided by 18, which equals 1/30. Dividing the remaining 2/3 of the work by Ravi's daily rate of 1/30 gives (2/3) divided by (1/30), which equals 20 days to complete the work.

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