11 Plus Exams Forum

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

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 ....

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..

Thanks alot for the answers
much appreciated!