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 Post subject: maths scales
PostPosted: Wed Dec 29, 2010 9:05 am 
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Joined: Thu Sep 30, 2010 8:03 am
Posts: 32
I was wondering if someone could help me with scales in maths:

a map of scotland is drawn to a scale of 1:325, 000
how many cm on the map would show 65km?

I dont actually know how to do the working out! please could someone help explain

thanks in advance
saima


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 Post subject: Re: maths scales
PostPosted: Wed Dec 29, 2010 9:55 am 
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Joined: Fri Sep 15, 2006 8:51 am
Posts: 8116
On the train so excuse the brain. 1km = 100 000 cm so 65km = 650 000 cm so yr map would need 2cm to show 65 km. Pretty small scale ....


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 Post subject: Re: maths scales
PostPosted: Wed Dec 29, 2010 11:20 am 
1:325000cm
1:3250m
1:3.25Km

Proportion then. how many 3.25km in 65Km, answer 20
Therefore map is 20cm which is equivalent to 65km

My 10year old DS informs me..


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 Post subject: Re: maths scales
PostPosted: Fri Dec 31, 2010 4:52 pm 
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Joined: Thu Sep 30, 2010 8:03 am
Posts: 32
Thanks alot for the answers
much appreciated!


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