TASK DEFINITION: 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: Problem: in one hour , a boat goes 8 km along the stream and 2 km against the stream . the sped of the boat in still water ( in km / hr ) is : 
Options: a ) 3 , b ) 5 , c ) 8 , d ) 9 , e ) 10

SOLUTION: b

PROBLEM: Problem: a person buys an article at rs . 400 . at what price should he sell the article so as to make a profit of 40 % ? 
Options: a ) 600 , b ) 277 , c ) 560 , d ) 261 , e ) 281

SOLUTION: c

PROBLEM: Problem: how many liters of water must be evaporated from 50 liters of a 3 - percent sugar solution to get a 4 - percent solution ? 
Options: a ) 35 , b ) 33 1 / 3 , c ) 21 , d ) 16 2 / 3 , e ) 15

SOLUTION:
c