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Your question isn't really clear. Speed can't be expressed in just units of distance.

It must be a rate, distance per unit time. Such as, miles per hour, or miles per second,

miles per picosecond.

In an attempt to answer your question though, the speed of light is

-- 186,282 miles per second

-- 670,615,000 miles per hour

-- 16,094,764,800 miles per day

-- 5,878,612,800,000 miles per year

-- 0.000 000 186 3 mile per picosecond

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12y ago

What else can I help you with?