At their closest recorded distance apart, which was 34.8 million miles, it would take 182 seconds (just over three minutes). At their maximum possible distance apart, which is 250 million miles, it would take approximately 22 minutes for the signal to reach Mars.
video on the cost of concrete floors depending on the level of complexity concrete floors can cost as little as $ 2 to $ 6 a square foot or be as expensive as $ 15 to $ 30 a square foot
The cost of a concrete walkway is largely determined by the type of concrete poured. 1  A plain concrete walkway costs $4 to $6 per square foot. 2  Adding a single color or simple finish to the concrete raises the price to $6 to $10 per square foot.