question

 

a man takes twice as long to row a distance against the stream as to row the same distance in favour of stream. the ratio of speed of boat in still water and the steam is:

 

 option 1)
  

 2:1

  
 
 option 2)
  

 3:1

  
 
 option 3)
  

 5:2

  
 
 option 4)
  

 3:2

  
 
 option 5)
  

 2:3

  
 

 upstream downstream

time 2 1

speed 1 2 (distance is same so time will be inversely proportional to speed)

the only option which is satisfying the ratio is 3: 1.

so, option (b) is the answer.