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Anonymous
There are 100,000 cm in a km. Thus to convert from km to cm you have to multiply by 100,000. In this case we have 3km, so multiply that by 100,000 and you get:
3x100,000 = 300,000. Thus there are 300,000cm in 3km.
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.008 km
100000cm in a km
11.8 cm = 0.000118 km
100,000
Formula: km x 100,000 = cm840 km x 100,000 = 84,000,000 cm (84 million).