Question

 Aryan works 4 times as fast as Bulbul. If Bulbul completes a job in 60 days, then in how many days can Aryan and Bulbul together can complete the same job?
1. 12 days
2. 15 days
3. 24 days
4. 48 days

Answer 1

Correct Answer - Option 1 : 12 days

CALCULATION:

Aryan’s efficiency is 4 times that of Bulbul

⇒ The time taken by Aryan will be (1/4)^th of the time taken by Bulbul

⇒ Time taken by Aryan = 15 days

Let work be 60 units      ----(LCM of 15 and 60)

Aryan's work in one day = 4

Bulbul's work in one day = 1

Total work in one day = 5

Time taken = 60/5 = 12 days