Two medians of a triangle with unequal sides are 3 inches and 6 inches. Its area is 315 square inches. The length of the third median in inches, is:
<spanclass=′latex−bold′>(A)</span> 4<spanclass=′latex−bold′>(B)</span> 33<spanclass=′latex−bold′>(C)</span> 36<spanclass=′latex−bold′>(D)</span> 63<spanclass=′latex−bold′>(E)</span> 66 geometryratioparallelogramarea of a triangle