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 one
A) 16	B) 88	C) 29	D) 14	E) 12
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. 16nswer: 16
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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?