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?	Choose the correct choice from the following answers:
A) 1:3 B) 3:8 C) 6:3 D) 8:3 E) None
Sol.   Let the man rate upstream be x kmph and that downstream be y kmph. Then,   Distance coverd upstream in 8 hrs 48 min. = Distance coverd 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.   Answer 8:3
<result>D</result>
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?