The speed of light in vacuum is 2.998x10^8 m/s. What is the speed in km/hr and mi/min?

Speed of light in vacuum = 2.998 x 10^8 m/s

1m = 1/1000 km and 1s = 1/3600 hr

Speed of light in vacuum = (2.998 x 10^8 x (1/1000) km) / (1/3600) hr

Speed of light in vacuum = 10.792 x 10^8 km/hr

Now

1km = 0.6213 mi

1hr = 60min

As Speed of light in vacuum = 10.792 x 10^8 km/hr

Speed of light in vacuum = 10.792 x 10^8 x (0.6213mi) / 60min

Speed of light in vacuum = 0.1117 x 10^8 mi/min

Speed of light in vacuum = 11.17 x 10^6 mi/min