David covered a distance of 50 miles on his first trip. On a later trip he traveled 75 miles while going three times as fast. His new time compared with the old time was:	Pick one:  A) twice as much  B) three times as much  C) the same  D) half as much  E) a third as much
Let t be the time of the first trip.   On the later trip, David can travel 150 miles in time t.   The trip of 75 miles takes t/2.   The answer is half as much.
<result>D</result>
David covered a distance of 50 miles on his first trip. On a later trip he traveled 75 miles while going three times as fast. His new time compared with the old time was: