Multiple choice

Suresh completes a work in 60 days while Ravindra and Pankaj together do it in 40 days. What is the time taken by Pankaj to complete the same work, if he works alone?

  1. 120

  2. 150

  3. 100

  4. Cannot be determined

  5. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

We know Suresh's work rate is 1/60 per day and Ravindra+Pankaj together is 1/40 per day. However, we have no information about Ravindra's individual rate or any relationship between Ravindra and Pankaj that would let us separate their contributions. Without additional data, Pankaj's individual time cannot be uniquely determined.

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