Multiple choice

Rohan can do a piece of work in 36 days but with the help of Mohan he can complete the whole work in 24 days. Find the number of days in which Mohan alone can complete the whole work?

  1. 73 days

  2. 76 days

  3. 75 days

  4. 72 days

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

Rohan's rate = 1/36 work per day. Combined rate (Rohan + Mohan) = 1/24 work per day. Mohan's rate = (1/24) - (1/36) = (3 - 2)/72 = 1/72 work per day. So Mohan alone takes 72 days to complete the work. Option D is correct.

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