P is three times as fast as Q and working together, they can complete a work in 19 days. In how many days can Q alone complete the work?	Select the correct option.
A) 16 1/4 days B) 27 1/4 days C) 25 1/4 days D) 14 days E) 10 days
P = 3Q   P + Q = 3Q + Q = 4Q   These 4Q people can do the work in 19 days, which means Q can do the work in 76 days.   Hence, P can do the work in 25 1/4 days.   Answer:25 1/4 days
<result>C</result>
P is three times as fast as Q and working together, they can complete a work in 19 days. In how many days can Q alone complete the work?