light from the sun travels 1.5x10km to reach the earth .how long does it journey take in minutes?

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  1. 150 million km you mean
    which is 1.5 * 10^8 km
    which is 1.5 * 10^11 meters

    c is about 3 * 10^8 m/s

    distance = rate * time

    1.5 * 10^11 = 3 * 10^8 t
    (1/2) * 10^3 = 7
    so t = about 500 seconds
    or 8 1/3 minutes

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