Question

How much time (in seconds does it take light to travel 1.20 billion km?

Answer 1

Ok so light goes at a speed of 299,792 kilometers per second
so if my math is right 1.2 billion/299,792= 3335.646047926562 seconds

Answer 2

Answer:

Time, t = 4000 seconds

Explanation:

We know that,

$1\ billion\ km=1.2\times 10^9\ km$

$1\ billion\ km=1.2\times 10^{12}\ m$    

The speed of light, $c=3\times 10^8\ m/s$

Let t is the time taken by light. It can be calculated as :

$t=\dfrac{d}{c}$

$t=\dfrac{1.2\times 10^{12}\ m}{3\times 10^8\ m/s}$      

t = 4000 seconds

So, the time taken by the light is 4000 seconds, Hence, this is the required solution.