Question

a radar signal is beamed towards a planet from earth and its echo is received seven minutes later. calculate the velocity of the signal , if the distance between planet and earth is 6.3×10*10 m?

Answer 1

v=0.3×10^9
hope this is useful

Answer 2

Total distance travelled by the sound = 2 x 6.3 x 10^10 = 1.26 x 10^11 m

Total time = 7 minutes = 420 seconds.

Velocity of the signal = 1.26 x 10^11/420 = 3 x 10^8 m/s