- Thread starter sally9306
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sally9306 said:i couldn't get what is relative error and how can i get it.

The question was ' calculated area of a room is 174.2 square feet and actual area is 149.6. find realative error.'

Did you look for a definition of "relative error?" I'm sure it is in your textbook.

This link might help you, too:

http://www.ehow.com/how_4425529_calcula ... error.html

After you've reviewed your text and your notes, and this website, please repost showing us your work.

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That reference says, "[Relative error is] defined as the absolute error divided by the true value."sally9306 said:well, i read that, but i cant get it Can you form any questions for us about it?

is relative error = measured area/actual area ? Nope.

That reference also says, "To compute the absolute error, the difference between measurement and the true value is taken."

In your exercise, the measurement is 174.2 and the true value is 149.6, so their difference is the absolute error.

\(\displaystyle \text{Relative Error} \;=\; \frac{\text{Absolute Error}}{\text{True Value}}\)

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Here's my problem

measured cube is 2cm actual length 2.1

So i would do 2-2.1 then divide it by 2.1?

measured cube is 2cm actual length 2.1

So i would do 2-2.1 then divide it by 2.1?