Question

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]. 2 : 1
[B]. 3 : 2
[C]. 8 : 3
[D]. Cannot be determined
[E]. None of these

Answer 1

you can't solve this. the distance must be given.

Answer 2

A

Answer 3

Answer: Option C

Answer 4

c is the answer?

Answer 5

but how|?
it confuses me.

Answer 6

ya but dont kno steps

Answer 7

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.
8 hrs. and 48 min is equal to 528/60 or 44/5

44x/5 = 4y

y=11/5 x

Required ratio = (y + x) /2 : (y - x)2

y=11/5x

(11/5x+x)/2 : (11/5x - x)/2

16/5 x(1/2) : (6/5 x ) (1/2

8/5 x: 3/5 x

cancel 5 so, the answer would be 8:3

Answer 8

do you get it amit?

Answer 9

STILL THERE?

Answer 10

sry ... was busy in sm other wrk.. will hav a look
thanks

Answer 11

do you get it now?

Answer 12

Required ratio = (y + x) /2 : (y - x)2??

Answer 13

think its ratio of downstream to upstream correct?

Answer 14

yeah that is their ratio. I divided 2 in both sides.

Answer 15

okies tq got it :)

Answer 16

remember that if we divide a number to one side of the equation, we must also do the same way on the other side. it can't affect our answer.