arithmetic - a boat running upstream takes 8 hours 48 minutes to cover a certain distance while it take 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 rate upstream be x kmph and that downstream be y kmph. Then,
Distance coverd upstream in 8 hrs 48 min. = Distance covered downstream in 4 hrs.
=> [x 8 4/5] = (y * 4)
=> 44/5 x = 4y
=> y = 11/5 x.
Required ratio = [y + x / 2] : [6x / 5 * 1/2] : [6x / 5 * 1/2]
= 8/5 : 3/5
= 8:3.