X and Y together can do a work in \(2\dfrac{2}{5}\) days. Y and Z together can do the same work in 3 days. X and Z together can do the same work in 4 days. The time taken by X, Y and Z together to do the same work is:
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?
15 days 16 hours
18 days 16 hours
20 days 4 hours
15 days 8 hours
A, B and C can independently complete the same task in 4, 6 and 12 days, respectively. In how many days will they be able to complete the same task if they work together?