Question

37. 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?

• A. (a) 2:1
• B. (b) 3:2
• C. (c) 8: 3
• D. (d) Cannot be determined ​​​​​​​

Answer 1

The correct option is C

(c) 8: 3

Ans:37) (c) Let the man's rate upstream be xkmph and that downstream be ykmph.
Then, distance covered upstream in 8 hrs 48 min = Distance covered downstream in 4 hrs.

(xx8(4/5))=(yx4)
(44/5)x=4y
y=(11/5)x
Required ratio = (y+x)/2:(y-x)/2
= (16x)/5*1/2:6/5*1/2
= 8/5:3/5
= 8: 3