Multiple choice

A person walks a distance of $30m$ towards east with a speed of $2 ms^{-1}$ and $40 m$ towards north with speed of $312 ms^{-1}$. The average speed and average velocity for his journey is ........

$1.75 ms^{-1}, 3.5 ms^{-1}$
$3.5 ms^{-1}, 17.5 ms^{-1}$
$\dfrac{6}{5} ms^{-1}, \dfrac{42}{25} ms^{-1}$
$ \dfrac{42}{25} ms^{-1}, \dfrac{6}{5} ms^{-1}$

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