speed = distance / time
E.g. if you travel 150 miles in three hours your speed is 150/3 = 50 miles per hour.
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The equation used to calculate the distance something travels is given below . we know, speed = distance /time . distance = speed X time in meters /km /or any other unit of length.
speed=frequency x wavelenth xD
Speed = distance divided by time
You can calculate a speed by dividing a distance by the time it takes to cover that distance. If you want the instantaneous speed (for situations of variable speed), you need to calculate the distance and time for a fairly short time interval (ideally, the limit, when the time approaches zero).
Wave speed is the distance a wave travels in a given period of time. Frequency is the number of oscillations in a given period of time. The third leg of the triangle is wavelength--the distance between peaks of the wave. Given any two of these values for a wave, you can calculate the third.