Time taken by signal to reach the ground station : 6 minute To find:- Distance of artificial satellite from ground station Solution: - 1 minute = 60 second 6 minute = 6 x60 = 360 second So the Distance = Speed x Time ( speed of the light = 3 x 10⁸ m /sec The signal travel at this speed Distance = 360 x 3 x 10⁸ = 1080 x 10⁸ metres