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Patsy Issa · Answer 1 · 2023-03-26T14:50:26+0000

The speed of skater can be given as,

Here, v is the speed, d is the distance travelled and t is the time taken.

Substitute the known values,

$\begin{gathered} v=\frac{1.5\text{ km}}{(78\text{ s)(}\frac{1\text{ h}}{60\text{ min}})(\frac{1\text{ min}}{60\text{ s}})_{}} \\ \approx68\text{ km/h} \end{gathered}$

Thus, the speed of skater is approximately 68 km/h.

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