kilometer

He said he would run 200 kilometers in a day and he did.

The mainland of China covers 96,000,000 square kilometers, and it is the largest country in Asia, as well as the third largest in the world.

I still remember the first time I was in China; I was in Shandong, and I realised that that province alone is twenty six thousand square kilometres bigger than England.

In towns, speed is limited to 50 km/h.

The school is five kilometers from my home.