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DPChallenge Forums >> General Discussion >> Can you please help for maths?
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Showing posts 26 - 50 of 55, (reverse)
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 07/17/2006 03:08:32 AM · #26
Originally posted by Southern Gentleman:
2.4 minutes.


John and I have 3.6 minutes... Your time is less than half of what the tap alone can do, which isn't possible since the tap is faster than the hose by a third...

R.
 07/17/2006 03:12:50 AM · #27
Originally posted by Art Roflmao:
This being a photo site and all, we'll be expecting a picture of one or more of the following:
- A full water tank
- Your neighbor's hose
- Your neighbors unconscious body lying in the garage
- Your Math teacher giving the thumbs-up

** extra credit for a really cool water drop / splash shot in the tank


also please leave the EXIF info intact so we could help you with a better answer :p
 07/17/2006 03:13:02 AM · #28
Originally posted by Bear_Music:
Originally posted by Southern Gentleman:
2.4 minutes.


John and I have 3.6 minutes... Your time is less than half of what the tap alone can do, which isn't possible since the tap is faster than the hose by a third...

R.

All three of you: hands on the tap. When I count to 3, fill the tank. Let us know how long it takes. One... Two... THREE!

I'll be back shortly. All this talk has made me have to pee...
 07/17/2006 03:17:40 AM · #29
Originally posted by Bear_Music:
Originally posted by Southern Gentleman:
2.4 minutes.


John and I have 3.6 minutes... Your time is less than half of what the tap alone can do, which isn't possible since the tap is faster than the hose by a third...

R.

Opps did it wrong, let me check again.
 07/17/2006 03:32:36 AM · #30
3.6 minutes

Flow A/min. x 6 min. = Volume

Flow B/min. x 9 min. = Volume

therefore, (Flow A)*6 = (Flow B)*9

Flow B = 2/3*Flow A

Combined flow = Flow A + 2/3*Flow A = 5/3 Flow A

((5/3)*Flow A)/min. x 6 min. = Volume

Then, Flow A/min. x ((3/5)*6)min. = Volume

Answer: 3.6 minutes.

07/17/2006 03:37:41 AM · #31
Maths sucks.

:\
 07/17/2006 03:39:31 AM · #32
Can y'all quit repeating "3.6" for the love of Pete? Everyone is getting that as a subliminal message and using it to vote on my picture in Abstract Food. ;)
 07/17/2006 03:40:19 AM · #33
Originally posted by LucidLotus:
Maths sucks.

:\


Yeah, that's why I did it the practical way :-) It's easier...

R.
 07/17/2006 04:20:10 AM · #34
Originally posted by Bear_Music:
Originally posted by LucidLotus:
Maths sucks.

:\


Yeah, that's why I did it the practical way :-) It's easier...

R.


Too true Bear!!!
 07/17/2006 04:22:47 AM · #35
3.6 Confirmed...


Looks like John and Bear move on to the Spelling Bee competition.
 07/17/2006 07:04:15 AM · #36
::hands on hips and strict MOM face::

Ok you guys you know who you are!! Get your eyes on your own math books and do your OWN work!!

On another note.... why join a photography site just to ask us to do your math home work and do we have a parental permission slip fo ryou to be here ?
 07/17/2006 07:21:49 AM · #37
Originally posted by Di:
::hands on hips and strict MOM face::

Ok you guys you know who you are!! Get your eyes on your own math books and do your OWN work!!

On another note.... why join a photography site just to ask us to do your math home work and do we have a parental permission slip fo ryou to be here ?


Hey, Di: he apparently didn't have anyone he could ask for help at that late hour, so he turned to us. A couple of us took the trouble of explaining two approaches to HOW to solve the problem. Which presumably is what he was asking for. Hmmph :-) It seems perfectly OK to me, lawd knows I can remember doing plenty of this stuff with my own kids lo, these many years ago...

R.
 07/17/2006 08:21:54 AM · #38
I feel as far as education is concerned, one should ask anywhere. I do not mind asnwering if i could.
I remember in CAT exam in india , we get less than 40 sec to solve such problems (actually these are of simpler types). :-)

Originally posted by Bear_Music:
Originally posted by Di:
::hands on hips and strict MOM face::

Ok you guys you know who you are!! Get your eyes on your own math books and do your OWN work!!

On another note.... why join a photography site just to ask us to do your math home work and do we have a parental permission slip fo ryou to be here ?


Hey, Di: he apparently didn't have anyone he could ask for help at that late hour, so he turned to us. A couple of us took the trouble of explaining two approaches to HOW to solve the problem. Which presumably is what he was asking for. Hmmph :-) It seems perfectly OK to me, lawd knows I can remember doing plenty of this stuff with my own kids lo, these many years ago...

R.
07/17/2006 09:46:57 AM · #39
Sometimes, when my kids ask what I did at work today, I answer "math" and/or "spelling" and go into as much detail as I can without losing their attention. It's true, and hopefully it'll prevent them from being the 'those' kids at school who quip about learning something they'll never use.

:-)
 07/17/2006 10:16:25 AM · #40
Originally posted by Strikeslip:
Sometimes, when my kids ask what I did at work today, I answer "math" and/or "spelling" and go into as much detail as I can without losing their attention.

Yea, I'm probably going to have to stretch the truth as well when I get asked the question.

"Well son, I surfed the net and drank coffee..."
 07/17/2006 10:19:50 AM · #41
Originally posted by jhonan:
"Well son, I surfed the net and drank coffee..."

LOL, I do my fair share of that too. :-)
 07/17/2006 10:56:06 PM · #42
Originally posted by jhonan:
"Well son, I surfed the net and drank coffee..."

More accurately, "well son, I surfed the net and asked the gurus at DPChallenge.com..."
Hey, we're the next "AskJeeves(tm)", but even better because we are real people and not computer scripts, lol!
 07/17/2006 11:04:04 PM · #43
You should have turned to Tom Lehrer, an actual mathematics professor, for help with New Math.
 07/17/2006 11:20:02 PM · #44
It is simple.
Imagine Total work i.e to fill water tank is 100 % work.
So if you fill the tank in 6 minutes using tap it means you are doing 100/6= 16.6% of work per minute.

If you use your neigbours hose it means you are doing 100/9 = 11.11 % of work in a minute.

If you use both Tap and hose it means you are doing 11.11 + 16.66 = 27. 27 % of work in a minute.

Therfore 100 % of work will be done in = 100/27.27 = 3.6 hours.
07/17/2006 11:22:25 PM · #45
Originally posted by General:
It is simple.
Imagine Total work i.e to fill water tank is 100 % work.
So if you fill the tank in 6 minutes using tap it means you are doing 100/6= 16.6% of work per minute.

If you use your neigbours hose it means you are doing 100/9 = 11.11 % of work in a minute.

If you use both Tap and hose it means you are doing 11.11 + 16.66 = 27. 27 % of work in a minute.

Therfore 100 % of work will be done in = 100/27.27 = 3.6 hours.


Damn, 3.6 HOURS? How did we miss that? jejeje�

R.
 07/17/2006 11:28:09 PM · #46
3.6 mins will be correct in theory, but inaccurate in practical. There are many factors that may eventually effect the total time needed to fill the tank :p (I'm just being anal, lol)

edit: oops

Message edited by author 2006-07-18 01:01:58.
 07/18/2006 12:58:58 AM · #47
Originally posted by General:
It is simple.
Imagine Total work i.e to fill water tank is 100 % work.
So if you fill the tank in 6 minutes using tap it means you are doing 100/6= 16.6% of work per minute.

If you use your neigbours hose it means you are doing 100/9 = 11.11 % of work in a minute.

If you use both Tap and hose it means you are doing 11.11 + 16.66 = 27. 27 % of work in a minute.

Therfore 100 % of work will be done in = 100/27.27 = 3.6 hours.


Right, but 3.6 minutes not hours.

Message edited by author 2006-07-18 00:59:11.
 07/18/2006 01:03:34 AM · #48
I meant to write 3.6 minutes only and not hours
 07/18/2006 02:30:26 AM · #49
Originally posted by GeneralE:
You should have turned to Tom Lehrer, an actual mathematics professor, for help with New Math.

Or Ma and Pa Kettle Math
 07/18/2006 02:32:55 AM · #50
they working in parallel, so time is 6*9/(6+9) = 3.6
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