Correct Answer: Option A

Explanation

\(Average \hspace{1mm}speed = \frac{Distance}{Time\hspace{1mm} taken}\)
Distance = 800m = \(\frac{800}{1000}\)km = 0.8km 
Time\(\hspace{1mm}taken = 20\hspace{1mm}minutes = \frac{20}{60}\)hr

= \(\frac{1}{3}hr\\Average \hspace{1mm} speed = \left(0.8\div \frac{1}{3}\right)\)km/hr

= (0.8\(\times\)3)km/hr =2.4km/hr

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