The time taken by a data signal to reach a moon and then back to earth was about:

Explanation

The average distance between the Earth and the Moon is approximately 384,400 kilometers. Radio waves, which are commonly used for communication with spacecraft, travel at the speed of light, which is about 299,792,458 meters per second.To calculate the one-way travel time from Earth to the Moon, we can divide the distance by the speed:Travel time (one way) = Distance / SpeedTravel time (one way) = 384,400,000 meters / 299,792,458 meters/second ≈ 1.28 secondsFor the round trip (to the Moon and back), we simply multiply the one-way travel time by 2:Round trip travel time ≈ 1.28 seconds/trip * 2 trips ≈ 2.56 secondsSince the question asks for an approximate value, and considering that the actual distance to the Moon can vary slightly depending on its orbit, 2 seconds is a reasonable estimate for the round trip travel time.