Answer with Explanation:
Let the man's rate upstream be x kmph and that downstream be y kmph.
Then, distance covered upstream in 8 hrs 48 min = Distance covered downstream in 4 hrs.
=> (x x 8 4/5) = (y x 4)
=> 44/5 x =4y
=> y = 11/5 x.
Therefore, Required ratio = ( y + x/2) : ( y - x/2)
=> (16x/5 x 1/2) : (6x/5 x 1/2)
=> 8/5 : 3/5
= 8 : 3.
Let the man's rate upstream be x kmph and that downstream be y kmph.
Then, distance covered upstream in 8 hrs 48 min = Distance covered downstream in 4 hrs.
=> (x x 8 4/5) = (y x 4)
=> 44/5 x =4y
=> y = 11/5 x.
Therefore, Required ratio = ( y + x/2) : ( y - x/2)
=> (16x/5 x 1/2) : (6x/5 x 1/2)
=> 8/5 : 3/5
= 8 : 3.