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Converting miles to minutes

  1. Feb 4, 2010 #1
    1. Convert 93x10^6 miles to minutes given that 1 km= .62 mile and that light travels at a speed of 3.0x10^8 m/s

    Im having a problem processing this
     
  2. jcsd
  3. Feb 4, 2010 #2
    The question is phrased clumsily. You can never convert a unit of distance into a unit of time. I assume the question means to ask, "How many minutes does it take for a particle traveling the speed of light to travel 93x10^6 miles?"

    You can use pure unit conversion to think out the answer:
    [tex]\frac{93x10^6 miles}{1} * \frac{1 km}{.62 miles} * \frac{1000 m}{1km} * \frac{1s}{3.00x10^8 m} * \frac{1 minute}{60 seconds}[/tex]
     
  4. Feb 4, 2010 #3
    Use dimensional analysis. I believe you're trying to find the amount of time it takes for light to travel over 93x10^6 miles, thus converting from miles to minutes.
     
  5. Feb 4, 2010 #4
    thank you, i knew something was wrong with the question....
     
  6. Feb 4, 2010 #5
    The answer is 8.33 minutes
     
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