state gov UP Police Assistant Operator (Radio Cadre) Mock Test Quantitative Aptitude Time and Work Work Efficiency
Kishore can complete a piece of work in 15 days, Naresh in 20 days and Suresh in 30 days. Kishore and Suresh worked together for 2 days and then Kishore was replaced by Naresh. In how many days, altogether, was the work completed?
1
12.5
2
10
3
12
4
11.6