Question

a unit for measuring a very large distance is called a light year it is the distance covered by light year in one year Express express the light year in ammeters take a speed of light S3 into 10 to the power 8 ms-1

Answer 1

d = v * t
d = 3*10^8 * 3*10^7
d = 9 * 10^15 m (approx)