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'.

[EX Q]: Problem: the area of a circle is increased by 1500 % . by what percent has the radius of the circle increased ? 
Options: a ) 100 % , b ) 200 % , c ) 300 % , d ) 600 % , e ) 800 %
[EX A]: c

[EX Q]: Problem: the sale price sarees listed for rs . 600 after successive discount is 20 % and 5 % is ? 
Options: a ) 227 , b ) 358 , c ) 456 , d ) 787 , e ) 191
[EX A]: c

[EX Q]: Problem: a man walking at a rate of 15 km / hr crosses a bridge in 35 minutes . the length of the bridge is ? 
Options: a ) 1250 m , b ) 1750 m , c ) 950 m , d ) 1000 m , e ) 1300 m
[EX A]:
b