Sorry, I don't yet have an answer to that question - though you may want to try me on mobile
where I can do far more
How many The metre (meter in the US), symbol m, the base unit of length in the International System of Unitses (SI) in a The kilometre (American spelling: kilometer; SI symbol: km), the unit of length in the metric system, equal to one thousand metres and is therefore exactly equal to the distance travelled by light in free space in of a second?
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