14. Which of these is equal to one million millimetres?
A 1 metre
B 10 metres
C 100 metres
D 1 kilometre
E 10 kilometres
Solution
D Since there are 1000 millimetres in one metre, one million millimetres make
$$
\frac{1000000}{1000} \text { metres }=1000 \text { metres }=1 \text { kilometre } \text {. }
$$