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Topic: Watermelons. (Read 894 times) |
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rloginunix
Uberpuzzler
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Watermelons.
« on: Jan 8th, 2015, 9:26am » |
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Watermelons.
A total of 100 kilograms of just harvested watermelons contained 99% water. While in transit to a store these watermelons (uniformly) lost just 1% of their water content.
What was the total weight of the watermelons upon arrival?
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jollytall
Senior Riddler
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Re: Watermelons.
« Reply #1 on: Jan 8th, 2015, 11:03am » |
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Is it really the question? Or did they loose 1 pp?
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rloginunix
Uberpuzzler
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Re: Watermelons.
« Reply #2 on: Jan 8th, 2015, 11:19am » |
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Yes, that is the real question.
The watermelons lost 1% of their water content.
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towr
wu::riddles Moderator
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Some people are average, some are just mean.
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Re: Watermelons.
« Reply #3 on: Jan 8th, 2015, 11:27am » |
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Now I'm confused.
Is this like the cucumber question where before it's 99% water and after 98% water?
Or is it 100kg*99%=99kg of water before and 99kg - 1% = 89.01kg water after.
The way the question is phrased I'd suspect it's the later. The water content was 99kg and they lost 1% of that. So then it's now 99.01 kg, and otherwise 50kg.
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| « Last Edit: Jan 8th, 2015, 11:31am by towr » |
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Wikipedia, Google, Mathworld, Integer sequence DB
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rloginunix
Uberpuzzler
Posts: 1029
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Re: Watermelons.
« Reply #4 on: Jan 8th, 2015, 11:57am » |
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I see. Before posting this puzzle I have searched the forum for "watermelon weight" in "easy" and nothing came up. I figured it is safe to post. Apparently not. This is a duplicate and the "cucumber" puzzle is the original.
Delete this one, towr.
(redPEPPER in the "cucumber" puzzle got it - the intended answer is 50 kilograms since the amount of dry substance did not change but percentage-wise went from 1% to 2% so 1kg of dry substance is now one fiftieth of the total weight or 50 kg).
Sorry for a poor duplicate search attempt.
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jollytall
Senior Riddler
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Re: Watermelons.
« Reply #5 on: Jan 8th, 2015, 12:11pm » |
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So it was not the real question 
If it lost 1% of the water content (as you said) then it is still more than 99 Kg.
On the other hand if it lost 1 pp (percentage point), i.e. from 99% water content it went down to 98%, then it is only 50Kg.
I usually ask the question: Would you like to eat a bit old watermelon, the water content of which went down from the initial 99% to 98%?
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rloginunix
Uberpuzzler
Posts: 1029
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Re: Watermelons.
« Reply #6 on: Jan 8th, 2015, 12:26pm » |
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I see your point, jollytall. Your wording is better. I should have said:
...lost some amount of water which now comprises 98% of total weight ...
But now it's not much of a puzzle ...
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rloginunix
Uberpuzzler
Posts: 1029
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Re: Watermelons.
« Reply #7 on: Jan 8th, 2015, 6:49pm » |
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Poor Russian to English translation on my part. I am taking the blame for this one.
I live my professional life by the KISS principle (Keep It Simple Stupid) so, simplifying and reconciling the proper wording with the intended answer:
Consisting of 99% water at harvest time a watermelon weighed in at 10 kilograms. By the purchase time, due to the loss of water via evaporation, the same watermelon consisted of 98% water. How much did this watermelon weigh when purchased?
(boy, wording problems is harder than solving them)
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