# SOLUTION: The diameter of the Milky Way disc is approximately 9 x 10^20 meters. How long does it take light, traveling at 10^16 m/year to travel across the diameter of the Milky Way?

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 Click here to see ALL problems on Travel Word Problems Question 188666: The diameter of the Milky Way disc is approximately 9 x 10^20 meters. How long does it take light, traveling at 10^16 m/year to travel across the diameter of the Milky Way?Answer by Alan3354(30993)   (Show Source): You can put this solution on YOUR website!The diameter of the Milky Way disc is approximately 9 x 10^20 meters. How long does it take light, traveling at 10^16 m/year to travel across the diameter of the Milky Way? ------------- d = rt t = d/r t = 9E20/1E16 = 9E4 years t = 90,000 years