railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test Quantitative Aptitude Time and Work Work Efficiency
If A alone can complete a work in 20 days and B alone can complete the same work in 30 days, then which of the following statement(s) is/are correct?
I. Ratio of efficiency of A and B is 3 ∶ 2.
II. Working together A and B can complete the same work in 12 days.
1
Neither I nor II
2
Both I and II
3
Only II
4
Only I