How to work out upper and lower bounds 1 - GCSE question grade 7+

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This video is all about how to work with bounds and forms part of the playlist of the same name.

The question is aimed at around grade 6 GCSE maths:
A rectangle has a length of 14cm, correct to the nearest cm, and a width of 4.3cm, correct to the nearest mm.
a) Calculate the upper bound for the perimeter of the rectangle.
b) Calculate the lower bound for the area of the rectangle.


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