A can do a work in 22 days. B is 30% more efficient than A. How many days does B alone take to do the same job?	Choose the correct choice.
A) 222/13  B) 221/13  C) 220/13  D) 219/13  E) 218/13
Ratio of times taken by A and B = 130:100 = 13:10   suppose B alone to take x days to do the work   then, 13:10::22:x   13x= 10*22= 
<gadget id="calculator">10*22</gadget>
<output>220</output>
220/13 days   correct option is 220/13
<result>C</result>
A can do a work in 22 days. B is 30% more efficient than A. How many days does B alone take to do the same job?