Centimeters because a kilometer is about 3,000 feet long
and no one can be so tall.
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A tall swimmer would give his height in centimeters. Kilometers are used to measure long distances, while centimeters are used to measure height and length on a smaller scale.
To change kilometers to centimeters you would have to multiply by 100,000. 6500 kilometers is equal to 650,000,000 centimeters.
To convert from centimeters to kilometers, divide the measurement in centimeters by 100, since there are 100 centimeters in a meter, and then divide by 1000, because there are 1000 meters in a kilometer. For example, to convert 200,000 centimeters to kilometers, you would first divide by 100 to get 2000 meters, and then divide by 1000 to get 2 kilometers.
You would use the metric unit of centimeters to measure the height from the floor to the doorknob.
To convert centimeters to kilometers, you need to divide by 100, as there are 100 centimeters in a meter and 1000 meters in a kilometer. So, 0.345 centimeters is equal to 0.00345 meters. To convert meters to kilometers, you need to divide by 1000. Therefore, 0.00345 meters is equal to 0.00000345 kilometers.
It would take 1 billion years to travel 3500 kilometers if you were moving at a rate of 3.5 centimeters per year. This is found by converting the kilometers to centimeters to match the speed you're traveling.