Graduate Management Admission Test (GMAT) Practice Test

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What formula is used to calculate speed?

Distance multiplied by Time
Distance divided by Time
Total Distance divided by Average Speed
Average Speed multiplied by Distance

The correct answer is: Distance divided by Time

The formula used to calculate speed is based on the relationship between distance and time. Specifically, speed is defined as the distance traveled divided by the time it takes to travel that distance. This can be mathematically represented as: \[ \text{Speed} = \frac{\text{Distance}}{\text{Time}} \] This means that if you know how far an object has traveled and the duration of the travel, you can determine its speed by performing this division. The other formulas do not accurately describe how to calculate speed. For instance, multiplying distance by time would not yield speed but rather provide a product that does not have a standard physical interpretation in this context. Similarly, dividing total distance by average speed would not yield speed and would instead give another time measurement, and multiplying average speed by distance would lead to another measurement of distance, not speed.