Question

Light travels approximately 982,080,000 ft/s, and one year has approximately 32,000,000 seconds. A light year is the distance light travels in one year. Calculate the distance of one light year in inches.

Answer 1

So to solve this problem, we must convert units and then cancel units simultaneously:

$(\frac{982,080,000ft}{s})*(\frac{32,000,000s}{1})*(\frac{12inches}{1ft})=3.77x10^{17} inches$

Therefore we know that the distance that light travels in one year is $3.77x10^{17}$ inches.