A rectangle measures $$$8.5 \mathrm{~cm}$$$ by $$$10.7 \mathrm{~cm}$$$, both correct to 1 decimal place. Calculate the upper bound of the perimeter of the rectangle. ........................................ $$$\mathrm{cm} $$$

Mathematics

IGCSE&ALevel

CAIE

Exam No：0580_w20_qp_41 Year：2020 Question No：4(a)

Answer:

38.6

Knowledge points:

E1.10.1 Give appropriate upper and lower bounds for data given to a specified accuracy. (e.g. measured lengths.)

E1.10.2 Obtain appropriate upper and lower bounds to solutions of simple problems given data to a specified accuracy. (e.g. the calculation of the perimeter or the area of a rectangle.)

Solution:

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A rectangle measures $$\(8.5 \mathrm{~cm}\)$$ by $$\(10.7 \mathrm{~cm}\)$$, both correct to 1 decimal place. Calculate the upper bound of the perimeter of the rectangle. ........................................ $$\(\mathrm{cm} \)$$

Answer:

Knowledge points:

Solution:

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