Answer:
1 light year= 9.5 trillion km
Step-by-step explanation:
Light year is distance traveled by light in one year.
Distance = speed x time = speed of light x 1 year
1 light year= 3 x 10⁸ x 365 x 24 x 60 x 60 = 9.5 x 10¹⁵m=9.5x 10¹²km
1 light year= 9.5 trillion km