Question

if we calculate the speed of light by distance between earth and sun / time taken to cover then we have 149.6×10^9/480=311666666.6666 m/s that's not the speed of light
(the speed of light is 299792458 m/s)

Answer 1

The rays of sun take 500s (not 480) to reach earth.if you divide 149.6*10^9 by 500 you will get 299200000. this are approximate values.