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PostPosted: Fri Oct 09, 2009 9:41 am 
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Joined: Thu Aug 06, 2009 3:32 pm
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Hello,
ds and i have come across a scale question which i am having difficulty in explaining to him.Can someone please give an easy 10 year friendly solution?
there is a scale diagram of 'harry' on his broomstick and the length of the stick is 1.2m and measures 3.7cm.
the question asks the height from the ground of the broomstick.
this we have measured as 5.7cm
Help! and thank you in advance.


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PostPosted: Fri Oct 09, 2009 10:06 am 
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Joined: Fri Nov 17, 2006 8:54 pm
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Location: caversham
To make it easier I would expect to see 3.6cm and 5.4cm? As one is 50% more than the other. :) These questions normally have "easy" numbers. :shock:

steve


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PostPosted: Fri Oct 09, 2009 10:20 am 
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Joined: Thu Dec 18, 2008 10:12 am
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Location: Berkshire
The answer based on your numbers would be

3.6 cm =1.2m
5.7 cm =(1.2x5.7) / 3.6 =1.9
so 5.7 cm is equivalent to 1.9m

It is just simple proportion, but I don't know an easy way of explaining it to a 10 year old other than the way I've done it.

Hope it is of some help As Steve says, it would have been much easier if the one you were trying to find was 5.4 cm, the answer would be 1.8m
Rgds,
LFH


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PostPosted: Fri Oct 09, 2009 1:30 pm 
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Thank you for your replies and yes i thought the numbers were very awkward as well. Particularly as it was the first question on the paper!
But i think i have realised a fatal flaw that i didnt think of before and that is that this paper was downloaded and maybe the measurements have altered :oops:
It probably should have been simply double and therefore easier to understand.
thanks again.


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PostPosted: Fri Oct 09, 2009 1:36 pm 
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Shaftsbury1 wrote:
But i think i have realised a fatal flaw that i didnt think of before and that is that this paper was downloaded and maybe the measurements have altered :oops:


Thanks for solving the mystery. :)

steve


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PostPosted: Fri Oct 09, 2009 1:41 pm 
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Joined: Thu Dec 18, 2008 10:12 am
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Location: Berkshire
Although 1.9 is exact, and 1.2/3.6 is a third, so maybe it is right ? :D


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