In this task, you need to answer the given multiple-choice question on the general math. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

[Q]: Problem: if the sales tax reduced from 3 1 / 2 % to 3 1 / 3 % , then what difference does it make to a person who purchases an article with market price of rs . 10800 ? 
Options: a ) 11 , b ) 13 , c ) 14 , d ) 18 , e ) 10
[A]: d


[Q]: Problem: if the radius of a cylinder is doubled and height 5 times , what is the new volume of the cylinder divided by the old one ? 
Options: a ) 8 . , b ) 2 . , c ) 6 . , d ) 20 . , e ) 10 .
[A]: d


[Q]: Problem: the population of a town increased from 1 , 25,000 to 1 , 50,000 in a decade . the average percent increase of population per year is : 
Options: a ) 4.37 % , b ) 2 % , c ) 6 % , d ) 8.75 % , e ) none of these
[A]:
b