Correct Answer - Option 1 : 15 days
Given:
Time taken by 6 men to complete a piece of work = 10 days
Formula Used:
If a person takes x days to complete a work, part of the work completed by him in one day = 1/x
Calculation:
Time taken by 1 man = 6 × 10 = 60 days
∴ The time taken by 4 men to complete the work = 60/4 = 15 days
