Time speed and distance

[Mohit kumar]

In a race of one kilometer. A gives B a start of 100 meters and still wins by 20 seconds . But if A gives B a start of 25 seconds , B wins by 50 meters. the time taken by A to run one kilometer.

[DavidG@VeritasPrep]

In a race of one kilometer. A gives B a start of 100 meters and still wins by 20 seconds . But if A gives B a start of 25 seconds , B wins by 50 meters. the time taken by A to run one kilometer.

This question appears to be missing some important facets, such as answer choices, and, well, a question. I'm assuming the question is supposed to be "How long does it take A to run one kilometer?"