<span>The medium in which it travels through</span>
-- Light travels straight, not around in a circle. But if it did, it would cover
a distance equal to the length of the equator in about <em>0.13 second</em>.
-- At the speed of sound (in air at standard temperature and pressure),
it would take about <em>32.6 hours </em>to cover the same distance.
Is there any other information given? I don't think you can solve this without a time
Rain fall which is called run off
