railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test Quantitative Aptitude Time and Work Work Efficiency
Choose the most appropriate answer:-
30 men working 7 hours a day can do a piece of work in 18 days, in how many days will 21 men working 8 hours a day do the same work?
1
23 days
2
22.5 days
3
20 days
4
None of these