Question

The distance of the moon to the Earth is 384,400 km.
The speed of light is 2.998 x 108 m/s.
Work out how long it will take light to travel from the moon to the Earth.
Include suitable units.​

Answer 1

Step-by-step explanation:

t= d/s

so, 384400/2.998×108

first convert the km into m

so 384400 × 1000

384400000m

then, t= 384400000/ 2.998×108

= 384400000/323.784

= 1187211.22m/s

Answer 2

Answer:32378.4 seconds

Step-by-step explanation:

∵ s=d/t

∴2.998 x 108=38440000/t

⇒t=38440000/2.998 x 108

   t=32378.4