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Hey, this is fun :DHow about 20*6 + 21*6=246 discs? If you move every second row vertically and let the discs slide sideways you will gain an extra row while losing one disc from the moved rows. This would give you 246*pi*16=12365 cm2 of disc area. So: 15300-12365= 2934 cm2.Quote:
Originally Posted by Boris239
Do I get a cigar?
/Claes
I don't know the answers of other questions by myself yet.
Darn it Pen!!!!!!! Now I have to try these out - my boss isn't going to like that!!
If there are only half as many good Marriages as there are people in them, and some people are celibate, how many people are not in good Marriages?
If I'm a Mister, and you're a Mister, and all good people are Misters, how many people are good?
Does Pensive have the mathematical formulae for these good questions?
Hey Boris, I got something different for the first one: The time it Jason and Melvin to be 600m apart is 120 minutes. In 120 minutes Steve has walked 12000m and Jason has walked 9600 m which will equal 21600m when they meet.
Question 2: 2850 cm^2
Question 3: Still thinking, so far I have 3750cm^2 but I just read CJ's.
papayhead, why there should be 600m between Jason and Melvin, when Jasom and Melvin meet?
I checked my answer it fits
t=210 Steve is 210*100=21000 from A
Jason is 210*80=16800 from B
Melvin is 210*75=15750 from B
So there are 1050 m between melvin and Steve. Their speed of approaching is 100=75=175
So it will take them 1050/175=6 m to meet
The answer to the first question is thera are no people not in good marriagesQuote:
Originally Posted by Mililalil XXIV
The second problem doesn't have a solution- it is impossible to say how many people are good
Jason and Melvin don't meet.
I know. So?Quote:
Originally Posted by papayahed
oh duh. If it takes Steve six minutes to meet Melvin after he passed Jason wouldn't that be 600m that Steve has walked since his pace is 100m/min.
But Melvin was alo walking at that time and passed 6*75=450 m, so the distance is not 600 but 600+450=1050
Yeah, somehow that little part feel out of my equation. I did say I was getting dumber.
I do really stupid mistakes regularly, but because recently I started tutoring kids for SAT math the number of these mistakes diminished greatly( at least in elementary algebra)
That's the good thing about teaching, you learn so much from it. Not that I am a teacher, but that's why I know so little. :)
To illustrate what I tried to describe in words: If you stack the discs like the bottles in this picure you can cram 246 of them in...
/Claes