Correct Answer - Option 4 : 8 days
Given:
Time taken by Vijay to do 3/4 of a job = 12 days.
Efficiency of Ajay = 2 × Efficiency of Vijay
Calculation:
According to the question,
Time taken by Vijay to do 3/4 of a job = 12 days
⇒ Time taken by Vijay to do 1 job = 12 × (4/3)
⇒ 48/3
⇒ 16 days.
So, Efficiency of Vijay = 1/16
So, Efficiency of Ajay = 2 × Efficiency of Vijay
⇒ 2 × 1/16
⇒ 2/16
⇒ 1/8
Now, Days taken by Ajay to finish the work alone = 1/(1/8)
⇒ 8 days
∴ Ajay will take 8 days to finish the same job alone.