# Thread: Speed of Light.....Solving A Word Problem..Help!

1. ## Speed of Light.....Solving A Word Problem..Help!

The speed of light is ${3 x 10^8 }$ m/sec. How long does it take light to travel the ${149 x 10^9}$ m distance from the sun to the earth?

2. Originally Posted by Phresh
The speed of light is ${3 x 10^8 }$ m/sec. How long does it take light to travel the ${149 x 10^9}$ m distance from the sun to the earth?
speed is distance per unit time: $s=\frac{d}{t}$

Solving for t, we see that $t=\frac{d}{s}$

You know what s and d are; they are given to you in the problem.

Can you take it from here?

--Chris

3. okay umm i got 497 seconds is that correct?

4. Originally Posted by Phresh
okay umm i got 497 seconds is that correct?
Yep.

5. Originally Posted by Phresh
okay umm i got 497 seconds is that correct?
Yup! which is about roughly 8 minutes.

--Chris