BANK IBPS RRB Clerk 2025 Mock Test Series (Pre + Mains) Quantitative Aptitude Time and Work Work Efficiency
A can complete a piece of work in 10 days. B in 15 days and C in 20 days. A and C worked together for two days and then A was replaced by B. In how many days, altogether, was the work completed (in days)?
1
10
2
9
3
6
4
8
5
None of these