Question

Light travels at a rate of 3.0 x 108 meters per second. If the earth is 1.5 x 1011 meters away from the sun, how long does it take for light to travel from the sun to the earth?

Answer 1

Answer:

It takes 500 seconds

Step-by-step explanation:

Light travels at a rate of  3.0 × $10^{8}$ meters per second.

Distance of earth from the sun is 1.5 × $10^{11}$ meters.

We have to calculate the time it takes to reach the earth from sun

Since speed = $\frac{Distance}{Time}$

3.0 × $10^{8}$ = $\frac{1.5\times 10^{11}}{T}$

T = $\frac{1.5\times 10^{11}}{3\times 10^{8}}$

  = 0.5 × $10^{11}$ × $10^{-8}$

 = 0.5 × $10^{11-8}$

  = 0.5 × $10^{3}$

  = 500 seconds.

It takes 500 seconds for light to travel from the sun to the earth.

Answer 2

I am assuming you mean 3.0 *10^8 and 1.5 * 10^11.

time = distance/speed right. So, 
t = 500 s