<PRE><B>Question 241020</B>
Hello, 
We need to assume he travels directly west, then we can use the 
C^2=A^2+B^2 formula. This is used to find the hypotenuse of a right triangle. 
So plug in the numbers which will look like this: 
c^2=100^2+200^2 Do the math will give us: (Note c^2 represents the diagonal)
c^2=10000+40000 Add like terms gives us:
c^2=50000  Now square root both sides gives us:
c=223.61 miles (Rounded off to the nearest hundredth)
RJ Toftness
www.math-unlock.com</PRE>