Question

A boat running upstream takes 8 hrs and 48 mins to cover a certain distance, while it takes 4 hrs to cover the same distance running downstream. What is the ratio between the speed of the boat and the speed of the water current respectively? 

a) 2:1 

b) 3:2 

c) 8:3 

d) cannot be determined

Answer 1

Correct option: c) 8:3

Explanation:

Let the man rate upstream be x kmph and downstream be y kmph.

Then distance covered upstream in 8 hrs 48 mins = distance covered downstream in 4 hrs x*44/5 =y*4 therefore y=11/5*x. 

Required ratio= (y+x):(y-x)/2 = (16x/5*1/2): (6x/5*1/2) =8:3