Define velocity.
(N/A) Velocity is defined as the rate of change of displacement of an object. It is a vector quantity,meaning it has both magnitude and direction. The mathematical formula for velocity $(v)$ is given by $v = \frac{\Delta s}{\Delta t}$,where $\Delta s$ is the change in displacement and $\Delta t$ is the time interval. Its $SI$ unit is meters per second $(m/s)$.
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Abdul,while driving to school,computes the average speed for his trip to be $20 \, km \, h^{-1}$. On his return trip along the same route,there is less traffic and the average speed is $40 \, km \, h^{-1}$. What is the average speed (in $km \, h^{-1}$) for Abdul's trip?
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