It's roughly 1-1.5 seconds. Light (and radio) travel at 186,000 miles per second, and the moon is usually about 230,000 miles away.
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It would take about 1.47 seconds for a message sent from Earth to reach the astronauts when they were 10,600 km away from the moon. This is because light travels at approximately 300,000 km per second in space.
about 15 days
1 day
29.5 days
27 days