In this task, you need to answer the given multiple-choice question on the gain. Gain is the value by which to multiply the input. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Problem: an error 4 % in excess is made while measuring the side of a square . the percentage of error in the calculated area of the square is :
Options: a ) 4.16 , b ) 5.16 , c ) 7.16 , d ) 8.16 , e ) 9.16
d

Problem: a man ' s speed with the current is 12 km / hr and the speed of the current is 2 km / hr . the man ' s speed against the current is
Options: a ) 8 , b ) 10 , c ) 11 , d ) 12 , e ) 13
a

Problem: one - third of 1206 is what percent of 162 ?
Options: a ) 324.11 , b ) 300.12 , c ) 248.14 , d ) none of these , e ) can not be determined
c