Question

Calculate the average speed of a train which covers a distance of $624km$ in $13hours$ .

Answer 1

Average speed is measured as the total distance travelled by the time taken. Average velocity is measured as the displacement by the time taken.

Complete step-by-step solution:
Distance is the total movement of an object with no reference to direction. We will define distance on what proportion of ground an object has covered despite its starting or ending point. It’s a scalar quantity.
Time is defined by its measurement of what a clock reads. In classical, non-relativistic physics, it's a scalar quantity (often denoted by the symbol $T$ ) and, like length, mass, and charge, is typically described as a fundamental measure.
$S = D/T$
$= 624/13$
$= 48{\text{ km/hr}}$

Note: Since speed is a scalar quantity while velocity is a vector quantity. For example, we'd say that a car has a mean speed of $25$ miles per hour. Its average velocity could be $25$miles per hour east. Average speed is often viewed because of the rate of change in distance with reference to time. The average velocity of an object is its total displacement divided by the entire time taken. In other words, it's the speed at which an object changes its position from one place to a different place. Average velocity may be a vector quantity. The SI unit is meters per second. However, any distance unit per any unit of time can often be used when necessary, like miles per hour (mph) or kilometer per hour ($kmph$ ).