a^2+b^2=c^2 where c is the hypotenuse and a and b are the other two sides of the right angled triangle. 3^2+4^2=c^2 9+16=c^2 25=c^2 c=5 As the men walked opposite directions from each other,we can conclude that they are opposite each other. This means the lines that link them to the original point make 1 straight line. Therefore,the answer is 5+5=10