What is the perimeter of the right triangle whose exradius of the hypotenuse is 30 ? <spanclass=′latex−bold′>(A)</span>40<spanclass=′latex−bold′>(B)</span>45<spanclass=′latex−bold′>(C)</span>50<spanclass=′latex−bold′>(D)</span>60<spanclass=′latex−bold′>(E)</span>75