The length of an exercise book is given as 20cm correct to the nearest centimeter. In which of the following ranges of possible measurement does the actual length lie?
-
19.5 - 20.4cm
- 19.1 - 20.9cm
- 19.9 - 20.1cm
- 19.95 - 20.05cm
- 19 - 21cm
The correct answer is: A
Explanation
In mathematics, numbers ranging from 0.5 - 0.9 are approximated to 1, while 0.1 - 0.4 are taken down to 0.