P can complete five-eighths of a work in 15 days and Q can complete three-fourths of the same work in 30 days. They worked together for 8 days and then P left. How much time will Q working alone, take to complete the remaining work?
1
15 day 8 hours
2
15 days 16 hours
3
18 days 16 hours
4
20 day 4 hours