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- anonymous

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

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- anonymous

- chestercat

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- anonymous

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

- anonymous

A

- anonymous

Answer: Option C

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- anonymous

c is the answer?

- anonymous

but how|?
it confuses me.

- anonymous

ya but dont kno steps

- anonymous

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

- anonymous

do you get it amit?

- anonymous

STILL THERE?

- anonymous

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

- anonymous

do you get it now?

- anonymous

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

- anonymous

think its ratio of downstream to upstream correct?

- anonymous

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

- anonymous

okies tq got it :)

- anonymous

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.

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