Question

The speed of light is 186,282 miles/second. Pluto is (on average) 3.67 billion miles from the sun. How long does it take light from the sun to reach Pluto? Answer in hours to the nearest 0.1 hours.

Answer 1

1 billion miles =1 000,000,000 miles

therefore, 3.67×1000000000miles

=3670000000 miles

since , speed =distance/time

let the time be p...

therefore,

186282m/s => 3670000000/p

186282 ×p => 36700000000

p => 3670000000/186282

p => 19701.3131seconds

therefore.,

p (in hours) => 19701.3131/3600

=>5.47..hours

ANSWER =>5.47258 hour's