Sam and Joe both start at the same point. Sam walks 30 feet north, while Joe walks 40 feet west. How far apart are they at their new locations ?

Question

$\begin{array}{1 1} (a)\;\text{35 feet} \\ (b)\; \text{60 feet} \\ (c)\; \text{50 feet} \\ (d)\; \text{70 feet} \end{array}$