Answer:
The time taken in microseconds equals 140.7 microseconds
Explanation:
From the basic relation of speed, distance and time we can write
[tex]Time=\frac{Distance}{Speed}[/tex]
In our case distance equals 42.2 kilometers which equals [tex]42.2\times 10^{3}meters[/tex]
Using the given values in the above relation we get
[tex]Time=\frac{42.2\times 10^{3}}{3\times 10^{8}}=1.407\times 10^{-4}seconds[/tex]
Converting into microseconds we get
[tex]1.407\times 10^{-4}seconds=140.7\times 10^{-6}seconds=140.7microseconds[/tex]
