A can complete a certain job in 19 days. B is 90% more efficient than A. In how many days can B complete the same job?	Choose the correct choice from the following:
A) 6
B) 6.25
C) 7
D) 7.5
E) 10
Let, Total Work Unit = 190 Units   A can finish in 19 days = 190 unit work   i.e. A can finish in 1 days = 10 unit work   i.e. B can finish in 1 days = 10+(90/100)*10= 
<gadget id="calculator">10+(90/100)*10</gadget>
<output>19</output>
19 unit work   Days in which B will complete the work alone= 190/19= 
<gadget id="calculator">190/19</gadget>
<output>10</output>
10 days   Answer: Option 10
<result>E</result>
A can complete a certain job in 19 days. B is 90% more efficient than A. In how many days can B complete the same job?