Multiple choice

Ramesh can finish a piece of work by himself in 42 days. Mahesh, who is 1/5 times more efficient than Ramesh, requires X days to finish the work alone. What is the value of X?

  1. 25 days

  2. 50 days

  3. 35 days

  4. 20 days

  5. None of the above

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Mahesh is 1/5 more efficient than Ramesh, meaning Mahesh's efficiency = 1 + 1/5 = 6/5 of Ramesh's. If Ramesh takes 42 days, Mahesh takes 42 / (6/5) = 42 * 5 / 6 = 35 days.

AI explanation

Since Mahesh is 1/5 times more efficient than Ramesh, his efficiency is 1 plus 1/5, which equals 6/5 of Ramesh's efficiency. By the inverse efficiency rule, Mahesh will take 5/6 of the time Ramesh takes. Multiplying Ramesh's time of 42 days by 5/6 gives 35 days.