# Physics, error in perimeter question?

I want to measure the size of my back yard. I estimate that I can measure the length and width of the yard using a tape measure to an accuracy of 0.05m. I find that the length of the yard is 9.3 m and the width is 6.1 m.

Update:
it says you have to use the absolute error equation to find the error in 2l and 2w and then use equation S=sqrt((DeltaA)^2+(DeltaB)^2) to find the error in the perimeter.

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