ibps-so 2018 · Question 136 of 356

A contractor to whom the renovation of the strong room of the branch has been entrusted has two masons upon his rolls, of whom the rst can by himself complete the whole of the work in 24 days and the second can by himself complete the whole of the same work in 30 days. The two of them began the work together and worked at it together for 6 days, at the end of which the rst of them was withdrawn by the contractor and sent to another site, the second being left to carry the work through by himself. In how many days after the withdrawal of the rst mason was the whole of the work completed by the second mason working alone?

1. A15 days
2. B18 days
3. C17½ days
4. D16½ daysCorrect
5. E14 days