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math problem
7076 cr points
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22 / F / london, england
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Posted 2/29/08
so i'm stuck in this math problem.....some of u guys may find it easy...but i seriously don't get it...so could u guys help me? thnx a lot!! =D

the speed of a stream is 3 km/h. a boat travels 4 km upstream in the same time in takes to travel 10 km downstream. what is the speed of the boat in still water?

could u show the steps too? thanks!!!
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37 / F / Fort Meade, MD
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Posted 2/29/08
are you FUCKING kidding me?!?


i'm going to go thru my stash in ONE freaking NIGHT!

welook 
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23 / M / havent u noticed...
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Posted 2/29/08
BULLLLLLLLLLLLLLLl
Posted 2/29/08
I don't feel like doing math...so just
go to yahoo answers!
36562 cr points
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26 / F / Corner of No and...
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Posted 2/29/08
.............omfg. We're not here to do your homework for you. If you're having problems get urself a f*#$ing tutor. No personal threads. No spam threads. Stop wasting bandwith and filling up the forums with stupid crap like this.

~reported

Edit: I found a better picture

Posted 2/29/08

wildchild357 wrote:

so i'm stuck in this math problem.....some of u guys may find it easy...but i seriously don't get it...so could u guys help me? thnx a lot!! =D

the speed of a stream is 3 km/h. a boat travels 4 km upstream in the same time in takes to travel 10 km downstream. what is the speed of the boat in still water?

could u show the steps too? thanks!!!


The Help Thread
http://www.crunchyroll.com/forumtopic-1291/The-Help-Thread.html

Someone might come by and solve that problem. Beside Google and Yahoo can be your best solution to those questions.
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26 / F / Corner of No and...
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Posted 2/29/08
.......i almost pity you now. Tell ya what, when Daichitenski *a math major* gets online I'll have her look at it for ya.
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26 / アメリカ
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Posted 2/29/08
You know. If I wasnt an asshole I would answer this question for you. Thank the lord he made me an asshole.
Posted 2/29/08

wildchild357 wrote:

so i'm stuck in this math problem.....some of u guys may find it easy...but i seriously don't get it...so could u guys help me? thnx a lot!! =D

the speed of a stream is 3 km/h. a boat travels 4 km upstream in the same time in takes to travel 10 km downstream. what is the speed of the boat in still water?

could u show the steps too? thanks!!!



its #km/h now get the fuck out of here and get some tutoring
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26 / アメリカ
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Posted 2/29/08

twixandchips wrote:


wildchild357 wrote:

so i'm stuck in this math problem.....some of u guys may find it easy...but i seriously don't get it...so could u guys help me? thnx a lot!! =D

the speed of a stream is 3 km/h. a boat travels 4 km upstream in the same time in takes to travel 10 km downstream. what is the speed of the boat in still water?

could u show the steps too? thanks!!!



its 5km/h now get the fuck out of here and get some tutoring


Dude. You are not supposed to help him. The point it to let him suffer to the point he starts flinging shit at himself like a mentally retarded monkey looking in a fun house mirror.
Posted 2/29/08

sypris wrote:


twixandchips wrote:


wildchild357 wrote:

so i'm stuck in this math problem.....some of u guys may find it easy...but i seriously don't get it...so could u guys help me? thnx a lot!! =D

the speed of a stream is 3 km/h. a boat travels 4 km upstream in the same time in takes to travel 10 km downstream. what is the speed of the boat in still water?

could u show the steps too? thanks!!!



its #km/h now get the fuck out of here and get some tutoring


Dude. You are not supposed to help him. The point it to let him suffer to the point he starts flinging shit at himself like a mentally retarded monkey looking in a fun house mirror.


fine fine.....ill edit the answer out
Posted 2/29/08
Uhhh yeah I'd help but im not a smart asian T_T sorry! Go ask on yahoo answers or something
Posted 2/29/08
That was a dumb question. A math problem, though you could probably find answers on yahoo... And if you are in a decent school you should have a text book.
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29 / M
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Posted 2/29/08
Give the kid a break you Guys
Man ppl on CR can really be harsh at times.
Even though this is no math forum kid.
i think the answer to this question should be 7 km/h

since we have both upstream rate and downstream rate, all you need to know is + & -

10-3 = 7
4 +3 = 7

Think of it this way, if they already gave you the speed in still water, all you had to do for downstream was add 3 km/hr to your boat's speed in still water, and for upstream substract 3 km/hr to your boat's speed in still water.
So your speed in still water is 7 km/h

Even though this is quite late
- Peace -
2280 cr points
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27 / F / MA, United States
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Posted 2/29/08

wildchild357 wrote:

so i'm stuck in this math problem.....some of u guys may find it easy...but i seriously don't get it...so could u guys help me? thnx a lot!! =D

the speed of a stream is 3 km/h. a boat travels 4 km upstream in the same time in takes to travel 10 km downstream. what is the speed of the boat in still water?

could u show the steps too? thanks!!!


let's assume v=velocity, s=distance and t=time
v=s/t
so t=s/v
we know that the time traveling upstream is the same as downstream, so
t1=t2
s1/v1=s2/v2
s1=4, s2=10
for velocity
in downstream you add, since it's gonna be faster,and vice versa for upstream
4/v-3 = 10/v+3
4v+12=10v-30
6v=42
v=7 km/hr
since v is the velocity of still water here..
hope it helps!
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