An aquarium on a level table has rectangular faces and is 10 inches wide and 8 inches high. When it was tilted, the water in it covered an 8"×10" end but only three-fourths of the rectangular room. The depth of the water when the bottom was again made level, was<spanclass=′latex−bold′>(A)</span>221"<spanclass=′latex−bold′>(B)</span>3"<spanclass=′latex−bold′>(C)</span>341"<spanclass=′latex−bold′>(D)</span>321"<spanclass=′latex−bold′>(E)</span>4"