P can do a certain work in 18 days. Q is 60% more efficient than P. How many days does Q alone take to do the same job?  Pick
A) 14.25	B) 13.75	C) 12.5	D) 11.25	E) 10.5
Each day, P can do 1/18 of the work.   Each day, Q can do 1.6/18 of the work = 16/180 of the work   The time taken by B alone to complete the total work is   180/16= 
<gadget id="calculator">  180/16</gadget>
<output>45/4 = around 11.25</output>
11.25 days.   The answer is 11.25.
<result>D</result>
P can do a certain work in 18 days. Q is 60% more efficient than P. How many days does Q alone take to do the same job?