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Variation Q. - HSN forum

# Variation Q.

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### #1Grant =)

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Posted 27 February 2009 - 05:56 PM

Hello there.

Can someone help me with this Q.

The number of letters, N, which can be typed on a sheet of paper varies inversely as the square of the size, S, of the letters used.
The size of the letters used is doubled. What effect does this have on the number of letters that can be typed on the sheet of paper?

I know N (variation symbol) 1/S2, which means N=k/S2, but don't know the effect.

### #2Marcus

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Posted 27 February 2009 - 09:15 PM

you know N=k/S²...then size of letters S, is doubled so just replace S by 2S
N=k/(2S)²
N=k/4S²

now comparing the original equation with this one, you can see that it is 1/4 as much, so that's the effect
=-=-=Marcus=-=-=

### #3Grant =)

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Posted 01 March 2009 - 10:20 AM

Thanks.

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