The distance from a star to a planet is 3.1X10^17m?

Question

How long does it take light, traveling at 10^16 m/year to travel from the star to the planet?

Answer 1

So the distance from star to planet is 3.1 * 10 ^17m.
The time d = vt where d is the distance in meters, v is the velocity of light per year and t is the time in years.

3.1 * 10^17 m = 10^16 m/yr * t (years)
t (years) = 31 years

Answer 2

(3.1 x 10^17 m) (1 year / 10^16 m) = 31 years

Answer 3

speed=distance/time

10^16=3.1x10^17/time
time=3.1x10^17/10^16
=31 years