2000 Gauss 8 Problem 18

Jim drives 60 km south, 40 km west, 20 km north, and 10 km east. What is the distance from his starting point to his finishing point?

\textbf{(A)}\ 30 \text{ km}\quad \textbf{(B)}\ 50 \text{ km}\quad \textbf{(C)}\ 40 \text{ km}\quad \textbf{(D)}\ 70 \text{ km}\quad \textbf{(E)}\ 35 \text{ km}

If there are no answer choices shown, enter a numerical answer.

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