Question

Iam not able to get this one.sides of a rectangular plot of land are measured correct to nearest metre.measurement s given as 20m by 3m.so what is upper bound of the plot length?,the least possible perimeter of the plot?
you know that
the length is between 19.5 and 20.5 meters
the width is between 2.5 and 3.5 meters

So, use the largest and smallest values to get the range of perimeters.

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