Multiple choice

Raj and Ram working together do a piece of work in 10 days. Raj alone can do it in 12 days. Ram alone will do the work in?

  1. 20 days

  2. 40 days

  3. 50 days

  4. 60 days

  5. 70 days
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Work rate of (Raj + Ram) = 1/10. Work rate of Raj = 1/12. Work rate of Ram = 1/10 - 1/12 = (6-5)/60 = 1/60. Ram takes 60 days.

AI explanation

Assume the total work is the least common multiple of 10 and 12, which is 60 units. The daily capacity of Raj and Ram together is 6 units, while Raj alone has a capacity of 5 units. Ram alone completes 1 unit per day, meaning he requires 60 units divided by 1 unit per day, resulting in 60 days.

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