railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Time and Work Work Efficiency
Amit alone can complete a piece of work in 15 days and Balbir alone can do the same work in 10 days. If Amit alone works for 3 days after which Balbir joins him, then the whole work is finished in how many days?
1
\(4\frac{4}{5}\) days
2
\(\frac{1}{6}\) days
3
\(\frac{4}{5}\) days
4
\(7\frac{4}{5}\) days