Correct Answer - Option 3 : 84
Given:
Ronit is twice as efficient as Ajay.
He can finish work in 42 less days than Ajay.
Formula used:
Total work done = Efficiency × Total number of days
Concept used:
The ratio of efficiency of Ronit and Ajay = 2 : 1
The ratio of time of Ronit and Ajay = 1 : 2
Let the time taken by Ronit and Ajay be 1x and 2x respectively.
2x - x = 42
⇒ x = 42
Time taken by Ajay = 2x
⇒ 2 × 42
⇒ 84 days
∴ Ajay can finish the work in 84 days.
