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math problem
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26 / F / Corner of No and...
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Posted 2/29/08
^^ he answered it in one post - thus proving the pointlessness of this thread.

Edit: outposted...but ur post works too.
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24 / location location...
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Posted 2/29/08
Posting math problem on an anime site isn't really gonna help, but waddaya know... someone actually did solve it for you
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27 / F / MA, United States
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Posted 2/29/08
know what? Cr can be a good site for homework solutions since most of us spend most of our time here than on our books..
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22 / F / london, england
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Posted 2/29/08

ryokamemaniac 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!!!


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!


thnx soo much!!! =D wheee ur the best!! thanks
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27 / F / MA, United States
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Posted 2/29/08

wildchild357 wrote:


ryokamemaniac 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!!!


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!


thnx soo much!!! =D wheee ur the best!! thanks


you're welcome... hope you get it on time... actually, you give us a new idea of having cr members solve each other's homework..lol
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27 / F / MA, United States
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Posted 2/29/08

499766 wrote:

can someone teach me this rather than giving me answers?


what do you mean? I think I give the explanations
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M / [???????????????]
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Posted 2/29/08
Is that a middle school problem? >_______>
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24 / F / I'm not anywhere.
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Posted 2/29/08
Look, leave it blank and go ask ur teacher for help. Or ask a friend! Or ask a teacher! Or call one of those boring math shows where u call in and ask a math question and they do it. Whats the point of wasting a thread on a math question??
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22 / F / london, england
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Posted 2/29/08

ryokamemaniac wrote:


wildchild357 wrote:


ryokamemaniac 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!!!


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!


thnx soo much!!! =D wheee ur the best!! thanks


you're welcome... hope you get it on time... actually, you give us a new idea of having cr members solve each other's homework..lol


yup!! that's really kool...again thnx =D

Posted 2/29/08

wildchild357 wrote:


ryokamemaniac wrote:


wildchild357 wrote:


ryokamemaniac 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!!!


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!


thnx soo much!!! =D wheee ur the best!! thanks


you're welcome... hope you get it on time... actually, you give us a new idea of having cr members solve each other's homework..lol


yup!! that's really kool...again thnx =D



No it's just 4. The answer's always just 4

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27 / F / MA, United States
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Posted 2/29/08

Flourescent wrote:


wildchild357 wrote:


ryokamemaniac wrote:


wildchild357 wrote:


ryokamemaniac 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!!!


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!


thnx soo much!!! =D wheee ur the best!! thanks


you're welcome... hope you get it on time... actually, you give us a new idea of having cr members solve each other's homework..lol


yup!! that's really kool...again thnx =D



No it's just 4. The answer's always just 4



lol, how can it be, remember upstream and downstream have different velocities?

Posted 2/29/08

ryokamemaniac wrote:


Flourescent wrote:


wildchild357 wrote:


ryokamemaniac wrote:


wildchild357 wrote:


ryokamemaniac 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!!!


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!


thnx soo much!!! =D wheee ur the best!! thanks


you're welcome... hope you get it on time... actually, you give us a new idea of having cr members solve each other's homework..lol


yup!! that's really kool...again thnx =D



No it's just 4. The answer's always just 4



lol, how can it be, remember upstream and downstream have different velocities?



what's a velocity??

I just like the number 4..
2280 cr points
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27 / F / MA, United States
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Posted 2/29/08
^^ Flourescent... lol
Posted 2/29/08
l dont really have Math Problems
28723 cr points
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28 / M / California
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Posted 2/29/08

Flourescent wrote:


ryokamemaniac wrote:


Flourescent wrote:


wildchild357 wrote:


ryokamemaniac wrote:


wildchild357 wrote:


ryokamemaniac 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!!!


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!


thnx soo much!!! =D wheee ur the best!! thanks


you're welcome... hope you get it on time... actually, you give us a new idea of having cr members solve each other's homework..lol


yup!! that's really kool...again thnx =D



No it's just 4. The answer's always just 4



lol, how can it be, remember upstream and downstream have different velocities?



what's a velocity??

I just like the number 4..


Velocity is the change of distance over the change of time...
It's kind of like speed EXCEPT it has a direction.
Usually the units are meters/seconds.

=]

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