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: evaluate : 28 % of 400 + 45 % of 250 
Options: a ) 220.3 , b ) 224.5 , c ) 190.3 , d ) 150 , e ) none of these
b

Problem: the banker ' s gain on a sum due 6 years hence at 12 % per annum is rs . 900 . what is the banker ' s discount ? 
Options: a ) 1240 , b ) 1120 , c ) 1190 , d ) 2150 , e ) none of these
d

Problem: how long will a boy take to run round a square field of side 35 meters , if he runs at the rate of 9 km / hr ? 
Options: a ) 22 , b ) 38 , c ) 37 , d ) 56 , e ) 28

d