Radio signal has radius of 100 miles. u drive constant speed of 40 mph, nonstop, directly across the diameter of signal, how long can you listen before signal f

Question

how long can you listen before signal fades 

Answer 1

Laura,

 

If the radius of the omni-directional signal is 100 miles then the diameter of the signal's circular footprint is:

 

d = 2r = 200 miles.

 

So, at 40mph, it would take:

 

200miles/(40miles/hr) = 5 hours before the signal fades.