Answer
The English Channel Tunnel is Thirty-One point Zero Four miles long.
Work Step by Step
In this question, we need to write the number in words. We shall start by writing the whole number, which in this case is 31 $=$ Thirty-One)
Then comes the decimal point which is simply written as 'Point'.
The numbers following the decimal are named individually (zero four and NOT four) so,
0 $=$ Zero
4 $=$ Four
Therefore the answer is Thirty-One point Zero Four.
