Use the following formula: lw+- (w+l)e, where e is the absolute error in each length measurement, w is the width, l is the length to calculate the area of a 13.8m x 7.3m plot. What is the absolute error in this case? Somebody show me the working out please??

Question

anonymous · Answer

A little confusing, but I think this is what I'm looking at:

$\large Area = L*W\pm (W+L)*e$

$\large Length, L=13.8m$

$\large Width, W=7.3m$

And you want to solve for e?

anonymous · Answer

No, I have to find the area, and e is the absolute error but I don't know what the absolute error is. According to my teacher: A measurement is accurate to $$\pm \frac{ 1 }{ 2 }$$ of the smallest division on the scale. But I'm not sure how to work with that.

anonymous · Answer

Ah, ok. See that the measurements are precise to 0.1m, that means the absolute error is ±0.05m

anonymous · Answer

I'm so stupid, now it all makes sense! Thank you so much!

anonymous · Answer

No prob'
You're welcome.