railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Time and Work Work Efficiency
A can do \(\frac{2}{5}\) of a work in 6 days and B can do 30% of the same work in 3 days. They worked together for 4 days. The remaining work was completed by C alone in 6 days. B and C together can complete 70% of the original work in :
1
\(5\frac{1}{2}\) days
2
4 days
3
5 days
4
\(4\frac{1}{2}\) days