Consider a person attending a concert being broadcast over the radio, sitting about 45 meters from the stage. The person listens to the radio broadcast with a transistor radio over one ear and the non-broadcast sound signal with the other ear. Further suppose that the radio signal must travel all the way around the world before reaching the ear.

What time does the radio signal or the sound signal will reach person?

Same time or different time Explain why?

Distance = 45 meters
Light speed = ? meter / sec
Sound speed = ? meter / sec