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Giant Jelly

Started by mmiguel, Sep 04 2012 02:26 AM

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12 replies to this topic

#1 mmiguel

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Posted 04 September 2012 - 02:26 AM

A giant jelly weighs 100 pounds and is 99% water by weight.
It is set out in the sun and water evaporates until it is 98% water by weight.

How much does the jelly now weigh?

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#2 vistaptb

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Posted 04 September 2012 - 02:50 AM

Spoiler for

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#3 phil1882

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Posted 04 September 2012 - 02:55 AM

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#4 inert-

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Posted 04 September 2012 - 03:31 AM

It would seem that the answer 50 given by vistaptb is exactly correct, not approximately correct. Because there is exactly one pound of non-water then this with exactly 49 pounds of water gives 50 pounds total with 98 percent water. If x is the total weight then the correct equation is (x-1)/x = 0.98

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#5 mmiguel

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Posted 04 September 2012 - 04:53 AM

Spoiler for You're telling me

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#6 Potok

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Posted 04 September 2012 - 12:33 PM

That will be correct, right ?

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#7 Rob_Gandy

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Posted 04 September 2012 - 10:00 PM

Spoiler for You're telling me
That taking away one measly percentage point in the water proportion corresponds to losing 50 pounds of water?

I know right? It seems quite odd and slightly unbelievable, but, as I'm sure you know, since the water makes up such a large portion of the total mass 1% less is a significant change.