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#26 2005-04-15 04:57:02
- Roraborealis
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Re: need help!!!
But then won't the guests vote for stewie instead of you?
School is practice for the future. Practice makes perfect. But - nobody's perfect, so why practice?
#28 2005-04-15 05:01:36
- static helper
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Re: need help!!!
i didnt join to make fun of you.
Vote Stewie
and Mr T and static helper #29 2005-04-15 05:04:01
- Mr T
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Re: need help!!!
u joined bCoz u luv maths. weren't you a member before the E=tally=3 incident
I come back stronger than a powered-up Pac-Man
I bought a large popcorn @ the cinema the other day, it was pretty big...some might even say it was "large
Fatboy Slim is a Legend #30 2005-04-15 05:11:01
- static helper
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Re: need help!!!
no i was on it at school. we got shown it to do sats revision. i joined when i got home
Vote Stewie
and Mr T and static helper #32 2005-04-15 05:17:56
- static helper
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Re: need help!!!
yr 9 sats time AHHHHhhh
better be going. tlk 2morrow MAYBE!! spooky, i could be dead!
Vote Stewie
and Mr T and static helper 
#36 2005-04-15 17:52:11
- MathsIsFun
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Re: need help!!!
There: 50 mi at 40 mi/h = 1.25h,
Back Again: 50 mi at 60 mi/h = 0.8333... h,
There and Back: 100 mi, taking 1.25h + 0.8333... h = 2.08333... h
Speed: 100 / 2.08333 ... = 48 mph DONE
By the use of my trusty calculator.
Who thought it should be the average of 40 and 60 = 50 mph ??
"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman
#37 2005-04-17 01:56:34
- Roraborealis
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Re: need help!!!
I didn't really know how to do the question.
School is practice for the future. Practice makes perfect. But - nobody's perfect, so why practice?
#39 2005-04-17 20:02:32
- Roraborealis
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Re: need help!!!
Oh, of course you did.
School is practice for the future. Practice makes perfect. But - nobody's perfect, so why practice?
#40 2005-12-08 12:59:07
- irspow
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Re: need help!!!
I was just browsing for interesting posts in the past and I noticed that this one was never really answered. The question asked how far the boy had walked.
let v be the velocity of the boy
D/v = t1
D/(4v/3) = 3D/4v = t2
delta t = t1 - t2
we know that delta t = 4/3 and it also equals D/v - 3D/4v
4/3 = D/v - 3D/4v
4/3 = D/4v
D = 16v/3 = 48km