arithmetic - a boat running upstream takes 8 hours 48 minutes to cover a certain distance while it takes 4 hours to cover the same distance running downstream what is the ratio between the speed of the boat and speed of the water current respectively - skillgun

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 * 44/5 = (y x 4)
=> 44/5 x = 4y
=> y = 11/5 x.
Required ratio = (y + x)/2 : (y - x)/2
= 16x/5 * 1/2 : 6x/5 * 1/2
= 8/5 : 3/5
= 8 : 3.