P can do a certain work in 16 days. Q is 60% more efficient than P. How many days does Q alone take to do the same job? Choose the correct choice from the following answers:
A) 8
B) 9
C) 10
D) 11
E) 12
Each day, P can do 1/16 of the work.   Each day, Q can do 1.6/16 of the work = 16/160 of the work   The time taken by B alone to complete the total work is   160/16= 
<gadget id="calculator">  160/16</gadget>
<output>10</output>
10 days.   The answer is 10.
<result>C</result>
P can do a certain work in 16 days. Q is 60% more efficient than P. How many days does Q alone take to do the same job?