Ernesto, the magnificent unicorn stallion, covered a distance of 50 kilometers on his first trip to zalsazaria. on a later trip he traveled 300 kilometers while going three times as fast. what was his new time compared to his old time?

  his new time was twice as long

Step-by-step explanation:

At three times the original speed, Ernesto could cover 150 km in the same time as his original trip. The later trip is twice as far as that, so the second time is double the first time.

At the same speed, time is proportional to distance.