Answer:
12.4 meters
Explanation:
We do have to use Pythagorean Theorem to get the diagonal part... But we are not done after that. It wants to know how far we have walked after going down the length, the width, and the diagonal. We are going to have to add 3 numbers at the end (3 measurements for the things I just mentioned)
5^2+2^2=c^2
25+4=c^2
29=c^2
c=sqrt(29) approx 5.4
So now we do 5+2+5.4 which is 12.4 meters