P is three times as fast as Q and working together, they can complete a work in 8 days. In how many days can Q alone complete the work?
Choose the correct choice from the following answers:
A) 32 days
B) 16 days
C) 13 days
D) 15 days
E) 19 days
B   16 days   P = 3Q   P + Q = 3Q + Q = 4Q   These 4Q people can do the work in 8 days, which means Q can alone do the work in  4*8= 
<gadget id="calculator"> 4*8</gadget>
<output>32</output>
32 days.   32 daysnswer : 32 days
<result>A</result>
P is three times as fast as Q and working together, they can complete a work in 8 days. In how many days can Q alone complete the work?