Question

light travels 3000000 scs if earth is 150 million km away from sun how many minutes it will take the light to come from sun to earth

Answer 1

• Speed of light=3×10^8m/s=3×10^5km/s
• Distance=150million km=150×10^6km

Now

$\\ \rm\longmapsto Speed=\dfrac{Distance}{Time}$

$\\ \rm\longmapsto Time=\dfrac{Distance}{Speed}$

$\\ \rm\longmapsto Time=\dfrac{150\times 10^6}{3\times 10^5}$

$\\ \rm\longmapsto Time=50\times 10^1$

$\\ \rm\longmapsto Time=500s$

$\\ \rm\longmapsto Time=8.33min$

• Can be written as 8min 20s.

Answer 2

Answer:

$speed \: of \: light = 3 \times 10 {}^{8} m \: per \: second. \\ distance = 150million \: km \\ = 150 \times 10 {}^{6} km. \\ \\ now \\ speed = \frac{distance}{time} \\ \frac{150 \times 10 {}^{6} }{3 \times 10 {}^{5} } \\ 50 \times 10 {}^{1} \\ 500sec \\ 8.33min. \\ it \: can \: be \: written \: as \\ 8min \: 20sec.$