A worker can complete a job in 25 days. If supervisor are 25% more efficient than worker, then how many days will 1 supervisor and 5 workers, working together, take to complete the job?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 4.
Given:
A worker can complete a job in 25 days
Supervisor are 25% more efficient than worker
Concept used:
Work = Efficiency × time ---- (1)
Calculations:
Ratio of efficiency of worker and supervisor = 4 : 5
Total work = 4 × 25 = 100 units
Required time = 100/(5 + 20) = 100/25 = 4 days