railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test Quantitative Aptitude Time and Work Work Efficiency
If A and B together can complete a work in 7.5 days while A alone can do this work in 12 days. Find in what time B alone can do the whole work alone?
1
18 days
2
15 days
3
20 days
4
12 days