What is the formula for calculating speed?

The correct formula for calculating speed is derived from the relationship between distance traveled and the time taken to travel that distance. Speed is defined as the rate at which an object covers distance. Therefore, using the formula, speed is calculated by dividing the total distance traveled by the total time taken to travel that distance. This fundamental equation reflects that speed is a measure of how quickly an object moves, allowing for comparisons between different objects or scenarios based on their motion.

The other options provided represent incorrect relationships or units of measurement, making them unsuitable for determining speed. For instance, dividing time by distance or multiplying distance by time does not yield a meaningful measure of speed, nor does involving acceleration imply a direct measurement of speed without referencing distance and time.