state gov RSMSSB Grade 4 (Group D) Mock Test Series 2025 Quantitative Aptitude Time and Work Work Efficiency
A and B complete a work in 10 hours. B and C complete the same work in 9 hours. But C only takes 18 hours. What is the time taken by B to complete the work ?
1
10 hours
2
20 hours
3
15 hours
4
18 hours
5
Question Not Attempted