P is three times as fast as Q and working together, they can complete a work in 12 days. In how many days can Q alone complete the work? Choose the correct choice from the following options: A) 16 days B) 17 days C) 19 days D) 14 days E) 10 days
P = 3Q   P + Q = 3Q + Q = 4Q   These 4Q people can do the work in 12 days, which means Q can do the work in 48 days.   Hence, P can do the work in 16 days.   16 daysnswer:16 days
<result>A</result>
P is three times as fast as Q and working together, they can complete a work in 12 days. In how many days can Q alone complete the work?