Question

Light travels at the speed 300.000km/sec .how far is the sun from earth when light from sun reaches the earth in 8 mins 20seconds?

Answer 1

Speed = Distance / Time
Distance = Speed * time
Speed = 3 * 10^8 m/s
Time = 8 min 20 seconds
= 500 seconds

So,
Distance = 3*10^8 * 500
= 1500 * 10^8
= 150000000000 metres
= 150000000 km
= 1.5 * 10^8 km.

Answer 2

THe speed of light are 300 km per second and the time is 8 min 20 second so we can change the 8 min 20 second to 500 second so speed of light is 300 km / sec then in 500 second the distance is 150000 km or 1.5 * 10^5