2 Answers

Wkordalski · Answer 1 · 2018-10-21T08:42:49+0000

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

Tio · Answer 2 · 2018-10-25T16:45:56+0000

Answer:

Time, t = 4000 seconds

Step-by-step explanation:

We know that,

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

$1\ billion\ km=1.2* 10^(12)\ m$

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

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

t=(d)/(c)

$t=(1.2* 10^(12)\ m)/(3* 10^8\ m/s)$

t = 4000 seconds

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

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