state gov Patna Civil Court Clerk/Reader Mock Test Series Quantitative Aptitude Time and Work Work Efficiency
A man can do a job in 12 days. His father takes 16 days and his son finishes it in 20 days. How long will they take to complete the job if they all work together.
1
5 days
2
5.8 days
3
5.6 days
4
5.1 days