Light travels at 2.998 X 10^8 meters/second
so, X 3
= 8.994 X 10^8 meter/second
Now to miles/hour
8.994 X 10^8 m/s (1 mile/1609 meters)(3600 seconds/1 hour)
= 2.0 X 10^9 miles per hour
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At 35 mph you will travel about 154 feet in three seconds.
60 miles
3 x 50 = 150 miles
The average velocity has two parts to it: The average speed and the average direction. The average speed is: (the distance you travel between 0 and 3 seconds) divided by (3). The average direction is: the direction from (the place where you started at 0 seconds) to (the place where you finished at 3 seconds).
~3 seconds