Light travels 9.45x10^15 meters a year. there are about 3.15x10^7 seconds a year. how far does light travel per second?

ANSWER:  

The speed of light is m/s.

SOLUTION:

Given, Light travels meters a year.  

And there are about seconds a year.  

We need to find how far does light travel per second.

We know that, for anything, the distance, speed and time relation is given by

Distance traveled = travelling speed x time taken ----- (1)

Here, in our problem distance traveled = meters a year.  

Time taken = seconds.

Now, substitute the above values in (1)

Speed =

Speed =

Speed = m/s.

Hence, the speed of light is m/s.

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