<em>Speed is a measure of the distance traveled by a body relative to the time taken to complete a trip or a journey. Mathematically, speed can be expressed as;</em>
speed = distance/time
Hence, time = distance/speed
The distance covering Dallas, Texas, to Salt Lake City, Utah is about 1500 miles and the speed limit is 60 mph, hence;
time = 1500/60
= 25 hours
<em>Therefore, the least amount of time that would be needed to cover the journey is </em><em>25 hours</em><em>.</em>
It depends on the season, but anywhere in the tropics (between 23.5 degrees North and 23.5 South) at high noon, when the sun is at the highest point in the sky.
