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?
-
A.
19.5 – 20.4cm -
B.
19.1 – 20.9cm -
C.
19.9 – 20.1cm -
D.
19.95 – 20.05cm -
E.
19 – 21cm
Correct Answer: Option 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.