P is three times as fast as Q and working together, they can complete a work in 18 days. In how many days can Q alone complete the work? Choose the correct choice from the following answers.
A) 24	B) 77	C) 88	D) 55	E) 778
P = 3Q   P + Q = 3Q + Q = 4Q   These 4Q people can do the work in 18 days, which means Q can do the work in 72 days.   Hence, P can do the work in 24 days.   24nswer:24
<result>A</result>
P is three times as fast as Q and working together, they can complete a work in 18 days. In how many days can Q alone complete the work?