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blackwolf



Member Since: 03 Nov 2009
Location: South West England
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United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
shaun.mobile wrote:
my partner and i were feeding our twins last night. they both take 150ml.

my partner commented that this volume does not seem to have increased over the past few weeks even though they are growing.

i asked her to consider this volume as a sphere and compare it to the size of their abdomen's.

what size is the sphere? Confused

no internet or reference books allowed!!!


A sphere with a radius of 3.295cm has a volume of 150ml.
Post #112872 6th Jan 2012 11:55am
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shaun.mobile



Member Since: 12 Dec 2011
Location: England
Posts: 156
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you must be using a sliderule blackwolf Laughing

with one of those new fangled calculators you should get 3.296cm

did you cheat though or can you remember that the volume of a sphere is four thirds pi R cubed?
Post #112876 6th Jan 2012 11:59am
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Martin
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An illustration of the two solutions:

"12"



"3.5"


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Post #112892 6th Jan 2012 1:03pm
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 17567
United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
shaun.mobile wrote:
you must be using a sliderule blackwolf Laughing

with one of those new fangled calculators you should get 3.296cm

did you cheat though or can you remember that the volume of a sphere is four thirds pi R cubed?


Yup, I could. Sad, is it not? Even sadder was working out the answer using nothing but pencil, paper, and a (very old) set of log tables!

If any of the youngsters on this forum don't know what "log tables" are, I suggest Googling it.
Post #112916 6th Jan 2012 3:13pm
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110SEB



Member Since: 29 Jan 2009
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I rest my case: Maths is a ****ing useless waste of time. Languages are by far 10x more useful.

I i needed to work this kind of **** out, i'd be a mathematician or an engineer of some sort. I'm not. Clearly.

Whistle Thumbs Up Shocked Laughing Embarassed
Post #113113 6th Jan 2012 10:42pm
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Birdy



Member Since: 07 Oct 2011
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“Languages are by far 10x more useful”

True - I’ve got laid many times in non-English speaking parts with my good French, German and Spanish, and basic Bosnian, Creole, Arabic and Luxembourgish.

Oh, plus a wallet full of local currency, of course.

Peter
Post #113133 7th Jan 2012 12:29am
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