Answer
A tinny bird is just learned how to fly, so it flies from a branch to a higher branch on the same tree.
At first, it flew to a branch that is 15 meters high than its nest. This journey took 8 seconds, so it decided to take a rest on this branch for extra 8 seconds.
Then he flew to a higher branch that is 15 meters away from its new branch (or 30 meters above its nest) and this trip took only 4 seconds.
It seems it learns how to fly perfectly.
Work Step by Step
A tinny bird is just learned how to fly, so it flies from a branch to a higher branch on the same tree.
At first, it flew to a branch that is 15 meters high than its nest. This journey took 8 seconds, so it decided to take a rest on this branch for extra 8 seconds.
Then he flew to a higher branch that is 15 meters away from its new branch (or 30 meters above its nest) and this trip took only 4 seconds.
It seems it learns how to fly perfectly.
